Citizen science perceptions into the distribution and impacts of the Common Myna (<i>Acridotheres tristis</i>) in Jordan

Simple SummaryWe aimed to investigate how an invasive cavity-breeding bird, the common (Indian) myna, and a native nest predator, the common brushtail possum, influence urban nest box use by native birds in Queensland and New South Wales, Australia. We quantified nest box use by invasive and native species, assessed nesting success and failure rates, and explored what environmental factors might influence nest box occupancy and nesting success. We found that the native possums were the most common nest box users and that possum occupancy of boxes was associated with higher rates of nesting failures by all bird species. More common myna nesting attempts were observed in areas where mynas have been established longer. We found no evidence of a significant negative impact by the common myna on other birds in our study locations, which may be partly due to the low rates of use of our nest boxes by native birds. Nevertheless, better nest box design and guidelines for setting them up are needed if we aim to provide more nesting opportunities for native birds to replace the decline in big old cavity trees.Many bird species in Australia require tree hollows for breeding. However, assessing the benefits of urban nest boxes to native birds requires frequent monitoring that allows to assess nesting success. To better understand the benefits of nest boxes for native birds, we examined the impact of local habitat characteristics, invasive species (common myna, Acridotheres tristis), and native mammalian predators on urban nest box use and nesting success of native birds. We installed 216 nest boxes across nine locations in southeastern Australia (S.E. Queensland and northern New South Wales) in both long-invaded sites (invaded before 1970) and more recently invaded sites (after 1990). We monitored all boxes weekly over two breeding seasons. We recorded seven bird species and three mammal species using the nest boxes. Weekly box occupancy by all species averaged 8% of all boxes, with the species most frequently recorded in the nest boxes being the common brushtail possum (Trichosurus vulpecula), a native cavity user and nest predator. We recorded 137 nesting attempts in the boxes across all bird species. The most frequent nesting species were the invasive alien common mynas (72 nesting attempts). We recorded an average nesting failure rate of 53.3% for all bird species. We did not record any common mynas evicting other nesting birds, and found that several native species used the same box after the common myna completed its nesting. We recorded native possums in 92% of the boxes, and possum occupancy of boxes per site was negatively correlated with bird nesting success (p = 0.021). These results suggest that when boxes are accessible to invasive species and native predators, they are unlikely to significantly improve nesting opportunities for native birds. To ensure efficient use of limited conservation resources, nest boxes should be designed to target species of high conservation importance and limit other species of both predators and competitors.

Reducing food waste is the important way to ensure food security. Household is the basic unit of society. Household is not only the main scene of food waste, but also an important place to carry out anti-food waste education. This study takes Zhengzhou city, Henan province as an example, based on 1315 first-hand survey data of urban household food waste, and divides such waste into two parts: food waste inside three meals and outside three meals during a day. It studies the overall situation of urban household food waste, household food waste behavior and its influencing factors, and proposes targeted reduction strategies on this basis. The results show that: (1) The per capita per day food waste of urban households was 15.47 g/d, of which vegetables account for 47.45% of the total, followed by staple foods (20.51%), and meat (13.41%). (2) There were significant differences in the amount and composition of per capita per day food waste inside and outside the three meals. The per capita per day food waste inside the three meals was 10.70 g/d, 2.24 times of that outside the three meals; vegetables (55.39%), staple foods (20.80%), and meat (18.72%) account for the largest proportion of waste inside the three meals, while vegetables (29.65%), milk (25.68%), and fruits (21.67%) account for the largest proportion of waste outside the three meals. (3) Reducing household food waste should focus on modifiable factors. Controlling the frequency of ordering takeout, increasing information intervention, and improving level of food waste awareness and household food management ability are the main strategies to reduce food waste in urban households.

In Australia, the introduced Common Myna (Acridotheres tristis) is commonly believed to aggressively displace native birds and outcompete them for food and nest resources. However, the current paucity of scientific evidence makes it difficult to devise appropriate management strategies for protection of urban bird populations. This study investigates the way in which the Common Myna uses the urban environment and interacts with other species while foraging and nesting in Sydney, Australia. The bird community varied between habitat types along an urbanisation gradient, and the abundance of the Common Myna increased significantly with the degree of habitat modification. Surveys of the frequency of interspecific interactions revealed that the Common Myna did not initiate a significantly greater number of aggressive encounters than did other species. Focal observations of two potential native competitors showed that despite foraging in close proximity, the Common Myna rarely interfered with feeding activity. Assessment of natural tree hollow occupancy found that Common Mynas used significantly fewer tree hollows than did native species. Analysis of nest site selection indicated that Common Mynas chose to nest in more highly modified habitats, and in artificial structures rather than in vegetation. These findings suggest that, in this study area, Common Mynas have little competitive impact on resource use by native bird species in the urban matrix. The logical conclusion of these results is that the substantial efforts currently directed towards culling of Common Mynas in heavily urbanised environments is misdirected, and resources would be better directed to improvement of natural habitat quality in these areas if the purpose of control is to enhance urban bird diversity.

Food loss and food waste are urgent global problems relating to environmental and social challenges including biodiversity loss, climate change, health, and malnutrition. Reduction targets have been set, including Sustainable Development Goal (SDG) 12.3, which aims to halve per capita food waste at retail and consumer levels globally by 2030, as well as reduce food losses along production and supply chains. Citizen science, the engagement of members of the public in data collection and other elements of the scientific process, can play a role in tackling the problem of food waste and food loss. In this paper, we scope opportunities for using citizen science to answer 26 priority research questions identified by experts in the field of food waste and food loss as being critical to achieving SDG12.3. We describe how citizen science can be used to quantify and understand causes of food loss and waste. Crucially, we demonstrate the value of citizen science in being not just a data gathering tool but also a method of bringing about change through influencing action, from individual behavior to policy making. Furthermore, we argue the need to bring together all actors in the food system in citizen science projects in order to build shared understanding that will ultimately lead to reduced loss and waste across the food system.

Food waste has become a global problem, causing widespread concern in all sectors of society. Many scholars and institutions have researched this issue from different perspectives, but theoretical and empirical research on food waste from the perspective of consumer perception is still limited. Therefore, this study constructs a theoretical framework based on food waste behavior of households and empirically analyzes the effect of consumer perception on food waste by 273 Chinese urban households eating at home. The reliable urban household food waste data are based on a combination of household questionnaire surveys, bookkeeping surveys, weighing surveys, and semi-structured interviews in 2018. The survey site is Zhengzhou City in Henan Province. The results show that the higher urban household consumer perception positive index, the smaller the amount of food waste per capita per meal, and the higher urban household consumer perception negative index, the greater the amount of food waste per capita per meal. These results suggest consumer perception affects urban household food waste behavior significantly. We need to encourage consumers to form a joint effort to change consumer perception about food waste in order to reducing food waste.

Although increasing global attention has been devoted to food waste management, there is still a critical research gap in understanding waste patterns and developing contextualized solutions for rapidly urbanizing areas in developing nations, where waste management infrastructure lags behind urban expansion. Using stratified random sampling of 244 sources encompassing markets, restaurants, institutions, and residential areas in Nonthaburi Municipality, Thailand, this study identified and characterized three distinct food waste categories: edible surplus food (FW1), food preparation waste, including spoiled items and bones (FW2), and postconsumption remnants (FW3). Analysis of the waste proportion patterns revealed that FW2 predominated (65.53%), followed by FW3 (32.55%) and FW1 (1.92%). Fresh markets constituted the principal source of waste generation (294.1 ± 42.3 kg/day), yielding a significantly greater quantity than private markets (117.61 ± 35.7 kg/day) and supermarkets (20.4 ± 12.8 kg/day). Statistical analyses revealed significant variations (p < 0.05) in food waste proportions across source categories. Given these findings and local infrastructure limitations, this study proposes a systematic, three-phase implementation strategy: (1) Immediate application of FW3 conversion to aquaculture feed, with an estimated food waste diversion potential of 10.72 ± 7.15 tons/day; (2) medium-term establishment of FW1 redistribution programs, which target 1.92% of total waste identified as edible surplus food, with a projected daily redistribution capacity of 0.153 ± 0.11 tons; and (3) long-term development of FW2 biofertilizer facilities, with an estimated food waste diversion potential of 52.62 ± 18.95 tons/day. This integrated approach simultaneously advances multiple sustainable development goals and establishes a replicable framework for sustainable food waste management in rapidly urbanizing regions of developing nations. The findings provide essential guidance for policy-makers and urban planners in implementing resource-efficient waste management systems.

Landfill gas emissions are one of the largest anthropogenic sources of methane especially because of food waste (FW). To prevent these emissions growing with world population, future FW best management practices need to be evaluated. The objective of this paper was therefore to predict FW production for 2025 if present management practices are maintained, and then, to compare the impact of scenario 1: encouraging people to stay in rural areas and composting 75% of their FW, and; of scenario 2, where in addition to scenario 1, composting or anaerobically digesting 75% of urban FW (UFW). A relationship was established between per capita gross domestic product (GDP) and the population percentage living in urban areas (%UP), as well as production of municipal solid waste (MSW) and UFW. With estimated GDP and population growth per country, %UP and production of MSW and UFW could be predicted for 2025. A relatively accurate (R(2) > 0.85) correlation was found between GDP and %UP, and between GDP and mass of MSW and FW produced. On a global scale, MSW and UFW productions were predicted to increase by 51 and 44%, respectively, from 2005 to 2025. During the same period, and because of its expected economic development, Asia was predicted to experience the largest increase in UFW production, of 278 to 416 Gkg. If present MSW management trends are maintained, landfilled UFW was predicted to increase world CH4 emissions from 34 to 48 Gkg and the landfill share of global anthropogenic emissions from 8 to 10%. In comparison with maintaining present FW management practices, scenario 1 can lower UFW production by 30% and maintain the landfill share of the global anthropogenic emissions at 8%. With scenario 2, the landfill share of global anthropogenic emissions could be further reduced from 8 to 6% and leachate production could be reduced by 40%.

Context Calls for expanding community-driven efforts to reduce introduced populations of common mynas (Acridotheres tristis) continue. Although the detrimental effects of common mynas on avian community composition and richness are well established, eradication has proven possible for island populations, and information on the efficacy of population suppression efforts of mainland urban populations is sparse. Aims We assess changes in avifauna associated with community-based control of urban common mynas. Methods We conducted replicate transect counts of birds in Melbourne, Australia, within an area where common mynas were suppressed and an adjacent area where no suppression occurred, before and during the suppression. Key results Population suppression reduced relative abundance of common mynas but did not alter overall species richness or diversity, including native and introduced taxa. However, on a species-specific level, suppression was associated with both increases and declines in large and small species, whether native or non-native. The largest positive response coincident with common myna suppression was an increase in the aggressive noisy miner (Manorina melanocephala) which, like common myna, detrimentally affects other native birds. Conclusions Community-based trapping reduced common myna relative abundance, but did not increase overall terrestrial bird richness or diversity; instead, responses were species-specific, including an increase in the native and aggressive noisy miner. Implications Complex interaction webs likely occur in urban birds, and possible functional redundancy of common mynas may influence outcomes of suppression, creating a new set of “winners” and “losers”.

A recurrent complaint of members who attend ESA Annual Meetings is that the large number of concurrent sessions make it impossible to attend all the ones of interest. Symposium Reports from the ESA Annual Meeting is one response to this dilemma. They provide, for those who could not attend, an overview of the symposium presentations and the resulting discussion, as well as a convenient means to identify the presenters. And attendees can review the session! The Editor hopes these Reports are useful, and encourages future Symposium organizers to write Reports for the Bulletin when the presentations are given. For detailed instruction for contributions see: 〈http://esapubs.org/esapubs/journals/Bulletin.htm#Typ〉. Until recently if one were to ask "who is a scientist?" a common response would be, someone who works at a university or a government agency or in a laboratory. In other words, many of us tend to think of scientists as professionals who have been academically trained and conduct research through the auspices of a research institution, agency, nonprofit organization, or academic institution. Historically, though, individuals from outside this circle of professionals have been instrumental in shaping and contributing to science. In fact, some of the most renowned scientists and ecologists could be considered citizen scientists (e.g., Charles Darwin, Harold Mayfield, Alexander Skutch). But the view that the public could actively contribute to science faded greatly over the course of the 20th century (particularly in the United States) to such an extent that we were left with the view that only someone who was professionally trained could be a scientist. Recently, however, we have witnessed an increase in the extent and acceptability of public participation and engagement in science. In particular, over the past decade we have seen a marked increase in such "citizen science" (Fig. 1). Although explanations of citizen science vary slightly, they converge on this definition: the involvement of citizens from the nonscientific community in academic research (Trumbull et al. 2000, Lee et al. 2006). Historical trend of citizen science articles. Data represent peer-reviewed articles as identified in ISI Web of Science using the search term "citizen science" from 1980 through 2008. The number of unique articles (n = 55) published is indicated by "articles," and the number of unique citations (n = 353) is indicated by "citations." Because citizen science has seen a dramatic increase in recent years, both in terms of the number of participants and its spread into new disciplines, a symposium was held at the 2008 Ecological Society of America Annual Meeting to address the role of such activity in ecology. Eleven speakers from around the world converged in Milwaukee, Wisconsin, to share their work in "Citizen Science in Ecology: The Intersection of Research and Education," a symposium organized by Christopher Lepczyk, Owen Boyle, and Timothy Vargo. The goals of the symposium were to explore the following questions: (1) Is citizen science a new discipline, sub-discipline, or tool, relative to ecology? (2) Are data collected by citizen scientists valid, and if so, comparable to data collected by professional ecologists or their assistants? (3) Can citizen science be an effective tool to help bridge the gap between ecological research, communities, and education, both for the public and students? (4) Is citizen science the same as or different from ecological monitoring, or is one a subset of the other? (5) Are citizen scientists actively participating in the scientific process as ecologists, thus increasing their ecological literacy? To address these questions, speakers discussed citizen science both in general conceptual terms and in case-specific contexts from around the world. Rick Bonney of Cornell University opened the symposium with an overview of the history and evolution of citizen science in academic research. He explained that citizen science began as a series of monitoring projects designed to put the findings of hobbyists, such as bird watchers and star gazers, to meaningful scientific use. Following these early monitoring projects were ones designed with educational goals and even some set up as experiments. Eventually citizen science started to become an accepted technique for data collection in several scientific disciplines. Today, new citizen science efforts are involving participants in data analysis as well as data collection, and some are even starting to collect data from online images such as nestcams (readouts from recorders aimed at birds' nests). Following on the heels of the history of citizen science was a series of four case studies describing ecological research and monitoring projects that rely upon volunteers for their success. These case studies were arranged along a continuum from large-scale national projects with thousands of volunteers to regional and local projects. In addition, each case study represented varying degrees of interaction between researchers and volunteers. Leading off the case studies was David Ziolkowski of Patuxent Wildlife Refuge, who discussed how citizens drive the North American Breeding Bird Survey (BBS). Specifically, the BBS protocol conducts annual bird surveys along >4000 routes (Fig. 2) across the United States, Canada, and Mexico, using a highly skilled volunteer workforce. Part of the success of the BBS program has been its relatively straightforward field protocol and standardized design. Moreover, the BBS program has resulted in over 400 bird species being surveyed annually at a cost of less than $900 per species per year. Without citizen scientists, such accomplishments could not be achieved. Similarly, in the United Kingdom, a long-running insect monitoring project has been led by citizen scientists in conjunction with Rothamsted Research, the oldest agricultural research station in the world. Philip Gould highlighted how the Rothamsted Insect Survey has used light traps (Fig. 3) to capture insects across 460 sites in the UK for the past 50 years. This survey takes about five minutes each day to collect insects, which are then sent to Rothamsted Research for sorting and identification of the macro-moth fraction of the catch. To ensure a robust monitoring project, volunteers are reimbursed for any trap maintenance and provided with annual summaries of the moths collected from their trap. The success of the program has been built upon: (1) keeping the monitoring system simple; (2) ensuring that the volunteers are trained; (3) knowing when to discontinue sites; and (4) providing all volunteers with feedback on their work. The value of the insect survey was demonstrated in recent findings that two-thirds of common moth species across the UK have declined over the last 35 years, with 20% declining so fast that they should be considered threatened. As a result, several more species have now been added to Biodiversity Action Plans in the UK. Both the BBS and the Rothamsted Insect Survey demonstrate how large-scale monitoring can be used to denote changes in diversity and abundance over time. Furthermore, they both use protocols to filter data, thereby allowing for robust data set production. Locations of breeding bird survey routes. Figure credit: Curtis Flahter and Mike Knowles. Examples of (A) a light trap station in use, and (B) placement in a back yard. Photo credits: (A) Syd Wright MBE, and (B) Philip Gould. At the regional scale, Susanne Masi, manager of Chicago Botanic Garden's Plants of Concern Program, presented an overview and findings from the garden's rare plant monitoring project. The Chicago Botanic Garden established this program to monitor listed and rare plants in the greater Chicago metropolitan area. Initiated in 2001, the program involves ~250 trained volunteers each year in collecting plant data (Fig. 4), and has now accumulated 8+ years of standardized data on 205 plant species at 245 sites. Aside from simply monitoring rare plants, the program has demonstrated several key findings related to using citizen scientists. First, a two-year volunteer data validation study comparing randomly selected volunteer data to professional data showed a high degree of correlation between the two groups. For example, there was >80% correspondence between the two groups in critical data fields such as population numbers and presence of threats. Second, the results of a Plants of Concern citizen science focus group showed that volunteers participated actively in, and understood critical elements of, the scientific process. Furthermore, participants unanimously experienced an increase of their involvement in stewardship and conservation activities as a result of the program, and reported sharing this scientific understanding and enhanced conservation commitment with the broader public. Volunteers (A) determining plot locations and conducting rare and listed plant inventories (B–D) as part of the Chicago Botanic Garden's Plants of Concern Program. Photo credits: (A) Peter Jacobs, (B) Robin Carlson, (C) Emily Kapler, and (D) Dani Drekich. Capping off the case studies was a presentation by Bill Mueller, who introduced the Milwaukee County Avian Migration Monitoring Partnership (MCAMMP), an avian monitoring study focused on migratory bird stopover ecology in the urban parks of Milwaukee County, Wisconsin. To date the project has utilized the assistance of >140 citizen scientists over six migrations (three years) to help address the major goals of assessing habitat use and quality in both riparian and upland sites, and quantifying habitat use by migratory birds. Citizen science volunteers involvement includes training for transect counts, assistance with bird-banding operations, vegetation sampling and analysis, and recording of data. One major aim of training the citizen scientists is that they will be able to establish a long-term, urban avian monitoring project that can expand in the future. The second main portion of the symposium was devoted to a set of talks on the issues of the philosophy, policy, and technology of citizen science. Rebecca Jordan began this second portion with a discussion of a framework for promoting ecological literacy within the context of citizen science programs. She stressed that program design must balance both the scientific goals, which include ensuring data accuracy, and educational goals. Together these goals promote conceptual knowledge about the system of study, epistemological knowledge about science processes, and behavioral change with respect to environmental and civic action. While there is much evidence to support the promotion of conceptual knowledge, the latter two areas warrant further investigation. Integrating cognitive and environmental action theory will likely prove useful as practitioners seek to broaden program impact. David Bonter of Cornell's Laboratory of Ornithology next discussed the issue of data validation processes for large citizen science databases, such as Project FeederWatch. Currently, Project FeederWatch receives >100,000 checklists from >14,000 citizen scientists annually, yielding over 5,000,000 bird observations of ~500 individual species. Thus, it is critical that such large volumes of data be inspected for any problems; this requirement has led to the development of a quality control and quality assurance protocol. This protocol uses a review system, whereby unusual observations or potential errors are flagged and sent to experts for follow-up with the citizen scientists. Unverified reports remain flagged and are excluded from data analyses and web-based data output. The system also allows researchers to identify volunteers who are in need of support and to focus educational efforts accordingly, ultimately improving data quality and integrity. Moving from data editing to data collecting, Louis Liebenberg, founder of CyberTracker Conservation, presented a talk on how technology can be used to get people back in touch with nature. Specifically, Louis has developed the free software program CyberTracker (available at 〈http://www.cybertracker.org/〉), which enables volunteers of all ages to collect biodiversity data on simple portable devices, such as smartphones and PDAs (Fig. 5). CyberTracker is already in active use for both citizen science projects and environmental education around the world. For instance, in the United States, NatureMapping, BioKIDS, and BioBlitz are using PDAs with CyberTracker software to enable volunteers of all ages to collect biodiversity data. Similarly, in South Africa, the NaturalWorld web site allows participants to share and view bird sightings, and in the Kalahari trackers from local communities are being employed to survey wildlife conservation corridors. Finally, the WhaleForce project involves yachtsmen around the world using CyberTracker to monitor whales. Ultimately, the software allows for easy data collection by citizen scientists and helps to promote people who engage the outdoors by collecting field data. Bushmen in Africa using CyberTracker. Photo credit: Louis Liebenberg. Michelle Prysby next discussed more efficient ways for interested citizens to find a project, and for projects to find interested volunteers. One partnership for scientists and educators interested in reaching trained citizen scientists consists of the Master Naturalist programs. These programs are volunteer training and service programs that involve the public in natural resource education, citizen science, and stewardship. Currently there are >25 Master Naturalist programs in the United States that represent a ready pool of volunteers who have been trained in core citizen science skills, such as recording field observations and using taxonomic keys to identify organisms. These volunteers are well connected to their local environments, and are part of an existing infrastructure that can support their citizen science volunteer activities. (For more information on natural resource education and stewardship programs such as Master Naturalists, Watershed Stewards, and Conservation Stewards, please see the Alliance of Natural Resource Outreach and Service Programs 〈http://www.anrosp.org〉). The final presentation of the morning was by Hague Vaughan, of Canada's Ecological Monitoring and Assessment Network (EMAN), who wove together the themes of the morning's talks. He described how citizen science fosters a desperately needed means to better link ecological monitoring to policy development and decision-making. His argument was that the emphasis on certainty in ecological monitoring leaves decision-makers lacking sentinel and feedback information where timeliness is a key factor. If focused on outcomes, complementary citizen science can be a means of enhancing effectiveness. To illustrate how to integrate citizen science into policy, Vaughan discussed a project that combined citizen data with targeted research and air quality monitoring stations in Hamilton, Ontario, Canada to identify pollution and lichen hot-spots that was used to deliver feedback on municipal and industrial choices (Fig. 6). A map of arboreal lichens in Hamilton, Ontario, Canada, based upon citizen science data. Darker green locations represent greater numbers of lichens, and points represent sampling locations. The symposium concluded with a round table discussion of the morning's talks. Following the symposium, an additional workshop on citizen science was held over the weekend at the Urban Ecology Center of Milwaukee. At this workshop many of the symposium speakers gave an additional talk during the morning portion, with an afternoon of hands-on activities designed to train and educate citizen scientists. Overall, the symposium sought to address five major goals related to citizen science. In reflecting upon these five goals it is clear that there was progress made on all, but not necessarily agreement. For instance, the general view was that citizen science has new elements to offer ecology, but there was no definitive agreement among the speakers that it was a new discipline or subdiscipline. Whether or not this will change remains to be seen; citizen science is still very much an area of new ideas and growth. On the other hand, several speakers presented data from their research illustrating that the quality of data collected by citizen scientists is of the same or better quality than that collected by professional ecologists. Such quality is enhanced further with the aid of both software (e.g., Project FeederWatch and CyberTracker) and expert assistance. Similarly, there was strong evidence that citizen science can be an effective tool to help bridge the gap between ecologists and the public. In terms of the overlap with monitoring, it is clear that they share a number of similarities and will likely continue to do so in the future. However, many of the citizen science projects were much broader than monitoring alone, because they engaged the public in the scientific process or served to enhance ecological literacy. Based upon the talks and concluding discussions, citizen science is an increasing part of ecology, and has great promise for contributing knowledge, improving ecological literacy, training scientists to work with the public, and providing information for policy-makers.

Despite concerns about invasive Common Mynas (Acridotheres tristis), few studies have experimentally demonstrated their impact on native birds. Using a Before-After-Control-Impact (BACI) design with 142 nest boxes, we assessed how Myna presence affected House Sparrows (Passer domesticus) and Great Tits (Parus major) before (2009-2010) and after (2020-2021) their arrival in 2015. Half the boxes had large entrances accessible to all three species; half had small entrances accessible only to Great Tits. In a 2022 field experiment, we manipulated nest box entrances and used cameras to study Myna predation and nest usurpation. Following the establishment of Myna, House Sparrow breeding declined by 68.1%. Great Tits increased use of small entrance boxes by 59.9% and decreased use of large entrance boxes by 45.4%. Although overall Great Tit breeding increased, fledging success declined in large entrance boxes, but not small entrance ones. In the 2022 experiment, 46% (n = 26) of Great Tit nests were predated; Common Mynas were responsible for 50% of these cases and subsequently bred in the usurped nests. This study experimentally demonstrates that House Sparrow breeding numbers decrease and that Great Tits change their nesting behavior after the appearance of the Common Myna. Additionally, this research found that Common Mynas impact native species by predating and usurping nests. Installing small-entrance boxes can help manage Great Tit populations. Further research should explore nest box designs for House Sparrows and their impacts on other cavity-nesting and non-cavity-nesting bird species.

Food waste is one of the most important issues facing the globe today, as more than one-third of food is wasted from production to consumption. Although there is growing scholarly interest in urban food waste management, more critical analysis is needed to understand the complex governance structures which operate in cities across the world. The governance of food waste is facilitated by a range of formal private, governmental, and non-governmental institutions operating from global to local scales. In addition, street vendors, households, and other local players engage in a range of informal livelihood strategies to manage food waste through the sharing, scavenging, reusing, and gifting of food. Also, given the impact of COVID-19 on global food systems, food waste governance has changed as institutions and households have been forced to rethink how they produce, consume, and waste food. To analyse these dynamics in greater detail, this chapter examines the case studies of Dayton, Ohio in the United States and Bogor in Indonesia. The chapter will explore the formal and informal mechanism, as well as networks of urban food waste governance. It will also highlight the diversity of food waste strategies while demonstrating at times hybridized and dynamic governance approaches.

Urban areas provide animals with both a unique set of challenges and resources. One of the novel resources available in urban areas is an abundance of human food waste. Although it is known that many urban-dwelling animals are consuming human food waste at some level, there is not a good understanding of the nutrients provided by this novel resource. Given that human food waste is unlikely to resemble an animal’s natural diet, there could be health consequences for an animal consuming human food waste. In some animals, nutritional imbalances can also lead to behavioral changes, making it important to understand more precisely what they are eating. To answer the question of what nutrients were available in urban food waste, we surveyed food waste in the Philadelphia–Camden urban matrix. We found that human food waste contained ∼1000% more carbohydrates than other nutrient types. Given the impact that carbohydrate-rich diets can have on human health, there may be important consequences for the animals in urban environments that consume this food waste. Therefore, it is possible that human food subsidies have cascading consequences for entire communities and their ecosystem services in cities.

SummaryWe describe a community‐run effort to cull Common Myna (Acridotheres tristis) in Melbourne undertaken with modest funding (overall: $30.14 per trap day, $5.17 per euthanized Common Myna). Trap success (overall, 0.04 birds per trap per day) peaked early in the effort and slowly declined. Trap specificity was high (83.8%) and similar between bait types. Dry cat food captured more Common Myna, and a similar assemblage of animals, to dry dog food. Bread baits captured a broader assemblage of animals. The community‐led trapping programme reduced the mean density of Common Myna and achieved high target specificity with relatively few unintended trap deaths. While long‐term impacts on the population of Common Myna or native birds are yet to be analysed, the results suggest that ongoing effort is required for population suppression.

Increased urbanization rates pose crucial challenges in terms of food systems’ sustainability, including urban food waste (FW). The global narrative around FW has focused mainly on Western countries, but recent evidence shows that FW is also a major issue in the developing world. The objective of this article is to define the characteristics and drivers of urban FW in low- and middle-income countries (LMIC). We firstly present a tailor-made three-step approach to identify urban FW hotspots in LMIC, understand the main drivers and design and implement prevention and reduction interventions considering LMIC food system characteristics. We then draw on results from four different urban FW case studies based in Nairobi (Kenya) and Dhaka (Bangladesh) and discuss their characteristics in light of the proposed approach. The case of Nairobi focuses on quantifying and understanding possible drivers of household FW in Kibera and characterizing FW disposal through a household survey (N = 774). The other three studies examine FW at retail, food service and institutional levels for onions, mangoes and beef in Dhaka. The results confirm that FW happens at the urban supply chain level, particularly among mobile vendors but also among households living below the poverty line. The article thus urges LMIC municipalities to consider urban FW strategies as a key action to tackle food security, environmental issues and FW management challenges.

What is the countercultural potential of citizen science? As a participant in the wider citizen science movement, I can attest that contemporary citizen science initiatives rarely characterise themselves as countercultural. Rather, the goal of most citizen science projects is to be seen as producing orthodox scientific knowledge: the ethos is respectability rather than rebellion (NERC). I will suggest instead that there are resonances with the counterculture that emerged in the 1960s, most visibly through an emphasis on participatory experimentation and the principles of environmental sustainability and social justice. This will be illustrated by example, through two citizen science projects that have a commitment to combining social values with scientific practice. I will then describe the explicitly countercultural organisation, Science for the People, which arose from within the scientific community itself, out of opposition to the Vietnam War. Methodological and conceptual weaknesses in the authoritative model of science are explored, suggesting that there is an opportunity for citizen science to become anti-hegemonic by challenging the hegemony of science itself. This reformulation will be expressed through Deleuze and Guattari's notion of nomadic science, the means through which citizen science could become countercultural. Counterculture Before examining the countercultural potential of citizen science, I set out some of the grounds for identifying a counterculture drawing on the ideas of Theodore Roszak, who invented the term counterculture to describe the new forms of youth movements that emerged in the 1960s (Roszak). This was a perspective that allowed the carnivalesque procession of beatniks, hippies and the New Left to be seen as a single paradigm shift combining psychic and social revolution. But just as striking and more often forgotten is the way Roszak characterised the role of the counterculture as mobilising a vital critique of the scientific worldview (Roszak 273-274). The concept of counterculture has been taken up in diverse ways since its original formation. We can draw, for example, on Lawrence Grossberg's more contemporary analysis of counterculture (Grossberg) to clarify the main concepts and contrast them with a scientific approach. Firstly, a counterculture works on and through cultural formations. This positions it as something the scientific community would see as the other, as the opposite to the objective, repeatable and quantitative truth-seeking of science. Secondly, a counterculture is a diverse and hybrid space without a unitary identity. Again, scientists would often see science as a singular activity applied in modulated forms depending on the context, although in practice the different sciences can experience each other as different tribes. Thirdly, a counterculture is lived as a transformative experience where the participant is fundamentally changed at a psychic level through participation in unique events. Contrast this with the scientific idea of the separation of observer and observed, and the objective repeatability of the experiment irrespective of the experimenter. Fourthly, a counterculture is associated with a unique moment in time, a point of shift from the old to the new. For the counterculture of the 1960s this was the Age of Aquarius. In general, the aim of science and scientists is to contribute to a form of truth that is essentially timeless, in that a physical law is assumed to hold across all time (and space), although science also has moments of radical change with regard to scientific paradigms. Finally, and significantly for the conclusions of this paper, according to Roszak a counterculture stands against the mainstream. It offers a challenge not at the level of detail but, to the fundamental assumptions of the status quo. This is what “science” cannot do, in as much as science itself has become the mainstream. It was the character of science as the bedrock of all values that Roszak himself opposed and for which he named and welcomed the counterculture. Although critical of some of the more shallow aspects of its psychedelic experimentation or political militancy, he shared its criticism of the technocratic society (the technocracy) and the egocentric mode of consciousness. His hope was that the counterculture could help restore a visionary imagination along with a more human sense of community. What Is Citizen Science? In recent years the concept of citizen science has grown massively in popularity, but is still an open and unstable term with many variants. Current moves towards institutionalisation (Citizen Science Association) are attempting to marry growth and stabilisation, with the first Annual General Meeting of the European Citizen Science Association securing a tentative agreement on the common principles of citizen science (Haklay, "European"). Key papers and presentations in the mainstream of the movement emphasise that citizen science is not a new activity (Bonney et al.) with much being made of the fact that the National Audubon Society started its annual Christmas Bird Count in 1900 (National Audubon Society). However, this elides the key role of the Internet in the current surge, which takes two distinct forms; the organisation of distributed fieldwork, and the online crowdsourcing of data analysis. To scientists, the appeal of citizen science fieldwork follows from its distributed character; they can research patterns over large scales and across latitudes in ways that would be impossible for a researcher at a single study site (Toomey). Gathering together the volunteer, observations are made possible by an infrastructure of web tools. The role of the citizen in this is to be a careful observer; the eyes and ears of the scientist in cyberspace. In online crowdsourcing, the internet is used to present pattern recognition tasks; enrolling users in searching images for signs of new planets or the jets of material from black holes. The growth of science crowdsourcing is exponential; one of the largest sites facilitating this kind of citizen science now has well in excess of a million registered users (Zooniverse). Such is the force of the technological aura around crowdsourced science that mainstream publications often conflate it with the whole of citizen science (Parr). There are projects within citizen science which share core values with the counterculture as originally defined by Roszak, in particular open participation and social justice. These projects also show characteristics from Grossberg's analysis of counterculture; they are diverse and hybrid spaces, carry a sense of moving from an old era to a new one, and have cultural forms of their own. They open up the full range of the scientific method to participation, including problem definition, research design, analysis and action. Citizen science projects that aim for participation in all these areas include the Extreme Citizen Science research group (ExCiteS) at University College London (UCL), the associated social enterprise Mapping for Change (Mapping for Change), and the Public Laboratory for Open Technology and Science (Public Lab). ExCiteS sees its version of citizen science as "a situated, bottom-up practice" that "takes into account local needs, practices and culture". Public Lab, meanwhile, argue that many citizen science projects only offer non-scientists token forms of participation in scientific inquiry that rarely amount to more that data collection and record keeping. They counter this through an open process which tries to involve communities all the way from framing the research questions, to prototyping tools, to collating and interpreting the measurements. ExCiteS and Public Lab also share an implicit commitment to social justice through scientific activity. The Public Lab mission is to "put scientific inquiry at the heart of civic life" and the UCL research group strive for "new devices and knowledge creation processes that can transform the world". All of their work is framed by environmental sustainability and care for the planet, whether it's enabling environmental monitoring by indigenous communities in the Congo (ExCiteS) or developing do-it-yourself spectrometry kits to detect crude oil pollution (Public Lab, "Homebrew"). Having provided a case for elements of countercultural DNA being present in bottom-up and problem-driven citizen science, we can contrast this with Science for the People, a scientific movement that was born out of the counterculture. Countercultural Science from the 1970s: Science for the People Science for the People (SftP) was a scientific movement seeded by a rebellion of young physicists against the role of US science in the Vietnam War. Young members of the American Physical Society (APS) lobbied for it to take a position against the war but were heavily criticised by other members, whose written complaints in the communications of the APS focused on the importance of scientific neutrality and the need to maintain the association's purely scientific nature rather than allowing science to become contaminated by politics (Sarah Bridger, in Plenary 2, 0:46 to 1:04). The counter-narrative from the dissidents argued that science is not neutral, invoking the example of Nazi science as a justification for taking a stand. After losing the internal vote the young radicals left to form Scientists and Engineers for Social and Political Action (SESPA), which later became Science for the People (SftP). As well as opposition to the Vietnam War, SftP embodied from the start other key themes of the counterculture, such as civil rights and feminism. For example, the first edition of Science for the People magazine (appearing as Vol. 2, No. 2 of the SESPA Newsletter) included an article about leading Black Panther, Bobby Seale, alongside a piece entitled “Women Demand Equality in Science.” The final articles