Northern Beaches Research Articles

A 30 year review of rockfall frequency and coastal cliff regression on the northern beaches of Sydney, Australia

A 30 year review of rockfall frequency and coastal cliff regression on the northern beaches of Sydney, Australia

The weather determined how ‘hot’ the tick paralysis season was in eastern Australia: 2018–2024

The eastern paralysis tick, Ixodes holocyclus, is a tick of much veterinary importance in Australia. Each year, thousands of dogs and cats present to veterinary clinics and hospitals with signs of tick paralysis. In a previous paper, we constructed two models to explain prevalence and temporal distributions of tick paralysis cases presenting to emergency veterinary hospitals in South East Queensland (2009–2020) and the Northern Beaches of Sydney (1999–2017). The first model accounted for the intensity of the clinical burden of tick paralysis based on the prevalence of cases of tick paralysis in the tick paralysis season whereas the second model accounted for the start of the tick paralysis season. In the present paper, we test our models further, with much additional data from 2021 to 2023 (South East Queensland) and from 2018 to 2023 (Northern Beaches of Sydney). During the defined tick paralysis season in these locations, 10.3 % (3207 of 31,217) of veterinary-consultations were for tick paralysis. On average, predictions for the prevalence of cases of tick paralysis were 1.3 % (0.013) away from the actual prevalence whereas predictions for the start of the tick paralysis season were 1.7 weeks away from the actual start of the season. The prediction of the prevalence of tick paralysis cases was most accurate for Brisbane and least accurate for the Northern Beaches of Sydney whereas, curiously, the prediction for the start of the tick paralysis season was most accurate for the Northern Beaches of Sydney and least accurate for Brisbane. We re-fitted the models with the new data. We predict that about 10 % (Sunshine Coast), 5 % (Brisbane), 7 % (Gold Coast) and 12 % (Northern Beaches of Sydney) of veterinary-consultations in the tick paralysis season of 2024 will be cases of tick paralysis, resulting in a tick paralysis clinical burden intensity of similar magnitude to previous years. Such predictions allow for timely public education campaigns around the importance of prevention and appropriate resource planning for veterinary clinics.

Marine Macro- and Micro Plastic Litter on Beach Sediment of Northern Peninsular Malaysia

This paper investigates the spatial distribution of small plastic litter on the beach of Kuala Perlis and Pulau Langkawi in the northern region of Peninsular Malaysia. The objectives are to ascertain the categories of macro marine litter and macroplastic types, the amount of microplastic in the sediment layer, and the relationship between macroplastic and microplastic. Macro marine litter was collected in 100-meter transects at six different locations. Sediment samples for microplastic identification were collected using a quadrat measuring 0.5 m × 0.5 m with a depth of 0.05 m. Plastic accounts up most of the macro marine litter collected (73.8%), followed by glass (12%), fabric (7.8%), rubber (4.4%), wood (2%), and metal (0.07%). Between 2018 and 2020, the overall weight of macroplastic (>5 mm) litter and the amount of microplastic (<5 mm) litter on northern beaches were 80.371 g/m2 and 11.094 g/m3, respectively. In this investigation, macroplastic collected on the beach surface ranged from 0.02 g to 14.09 g/m2, while microplastic in the beach sediment ranged from 0 to 1.192 g/m3. The packaging category seems to have the highest percentage of collected macroplastic. At the 95% confidence level, the calculated R2 of 0.7444 indicates a substantial association between macroplastic and microplastic. The linear regression equation is y = 0.1927x + 0.0226, with y representing microplastic (g/m3) and x being macroplastic (g/m2). This strong link demonstrates that the presence of microplastic in sediment is strongly related to the abundance of macroplastic on the beach. This finding provides a good approximation of actual microplastic occurrence to macroplastic abundance, which will be useful in environmental evaluation and management approaches.

The economic costs of alcohol-related harms at the local level in New South Wales.

Alcohol is a harmful, toxic and addictive substance that causes many diseases and injuries. Alcohol use also incurs a financial cost to the health care system and wider economy. This project aimed to undertake a cost impact analysis of alcohol-related harms at the local level in New South Wales (NSW). The alcohol-related harms costing model is an interactive tool designed for use by local health districts, stakeholders such as Liquor and Gaming NSW, NSW Independent Liquor and Gaming Authority and community stakeholders. Costs included in the analysis were alcohol-related hospitalisations, deaths, crimes, emergency department attendances, outpatient presentations and their impacts on productivity. Two local government areas (LGA) were used as case studies to demonstrate local impacts. In 2019-2020, the total cost of alcohol-related harms for NSW was estimated at $9 billion, at a rate of $120.3 million per 100,000 population. The total costs were comprised of alcohol-attributable premature mortality ($8.3 billion), non-fatal health care costs ($275 million) and crime costs ($457 million). A comparative analysis of two case study LGAs estimated that alcohol-related harms cost $195 million for the Northern Beaches LGA and $351 million for the Central Coast LGA. This research has developed a 'proof-of-concept' model to estimate the cost of alcohol-related harms at the local level in Australia, empowering health agencies and local community stakeholders to use economic evidence in their submissions in response to new liquor licence applications and other policies that impact their local community. This economic evidence can be used to improve the quality of decisions on alcohol regulation and policies. There are a number of future research opportunities that would enhance the economic evidence available to liquor licensing decision-makers.

The role of alcohol in the lives of midlife women living on the Northern Beaches of Sydney, Australia

BackgroundIn Australia, midlife women are experiencing increasing levels of risky drinking behaviours and alcohol-related harms. This is despite the general population trend of decreasing alcohol consumption overall. In light of these diverging trends, this research explores the role of alcohol in the lives of midlife women from their own perspective. MethodsSix semi-structured focus groups were conducted with 47 women aged 35–59 years of age. Residents from the Northern Beaches of Sydney, Australia were recruited, as this group of women appear to be experiencing heightened alcohol-related harms, with an alcohol-related hospitalisation rate 40 % higher than the NSW state average in 2017–18. ResultsMidlife women described the practical utility of drinking as a habit to relieve stress and escape trauma, as well as an effective method for creating and strengthening social connections within the parenthood life stage. Participants also described the act of moderation as a potent trigger for peer pressure and discussed the individual's tendency to prioritise the short term relieving effects of drinking, despite awareness of the long term health risks. ConclusionFindings around the pro-social role of alcohol as a woman and a parent should be explicitly considered when designing ‘swap it’ population health messages. Furthermore, the marked social penalty of moderation and tendency to discount long term health risks should also be factored into health promotion messages which seek to utilise moderation as a strategy to reduce alcohol-related harm for midlife women.

Alongshore variability in berm and sandbar migration patterns on a highly dynamic beach

Sediment exchange between the shoreface and the foreshore is investigated through the analysis of sandbar and berm migration cycles at La Misión beach in Baja California, Mexico. In general, nearshore sandbars migrate onshore during low-energy wave conditions merging with the shoreline to become intertidal sandbars that later contribute to berm rebuilding. However, significant alongshore differences were observed in the sandbar welding and berm rebuilding process, which can be attributed to alongshore wave skewness and near-surfzone flow variations. The analysis of topographic and bathymetric surveys collected monthly over a 5-year period revealed larger shoreline retreat and longer recovery times in the southern beach compared to the north. This was related to the inability of sandbars to weld to the intertidal beach during spring and summer, occurring only during extended periods of low-energy waves. In the southern beach, the berm formation process exhibited less dependence on incoming wave energy, persisting during mild-energy winters, and reforming in the presence of sandbars. Hydrodynamic measurements indicated that the southern part of the beach experienced relatively more intense net offshore flows (up to −0.2 ms−1) due to undertow, and possibly related to the presence of persistent rip currents. In contrast, the berm in the northern beach followed a seasonal erosion and rebuilding process associated with sandbar migrations driven by variations in incoming wave energy and cross-shore sediment transport. This was characterized by larger near-bed wave velocity skewness compared to the south. Net flows in the north were predominantly onshore, reaching up to 0.1 ms−1 during lower-energy periods with oblique wave incidence. This study reveals the presence of considerably distinct sandbar and berm migration cycles along a relatively short beach of 2.2 km long. It also highlights how such variability can be related to the morphodynamic feedback with sandbars affecting hydrodynamics, particularly near-bed wave skewness and near-surfzone flow variations, which in turn influence sediment transport and morphological evolution.

Coastal Erosion Caused by River Mouth Migration on a Cuspate Delta: An Example from Thanh Hoa, Vietnam

Coastal erosion poses a significant threat to the infrastructure of the coastal community at the mouth of the Ma River in Thanh Hoa Province, Vietnam. In response, emergency solutions such as hard, protective structures are often implemented. However, this approach exacerbates the problem as the underlying mechanisms of coastal erosion are not adequately investigated and understood. In this study, the long-term configuration of the mouth of the Ma River in Thanh Hoa Province, Central Vietnam, is investigated using Landsat imagery spanning from 1987 to 2023. An analytical solution of a one-line model for shoreline change was also used to examine the sand discharge from the Ma River and the diffusion coefficient for the sand transported along the shore by breaking waves. The results showed an asymmetric configuration of the mouth of the Ma River over the past 37 years. The supply of sand from the Ma River is around 350,000 m3/year. The majority of sand (ranging from 55% to 75%) is mainly transported to the northern beach of the Ma River delta. This uneven distribution of sand from the Ma River has led to the asymmetrical morphology of the delta apex in which the northern part of the Ma River delta is experiencing northward movement while the southern part of the Ma River Delta is moving southward and landward. The asymmetrical morphology of the delta at the mouth of the Ma River has recently been identified as the cause of severe coastal erosion. The diffusion coefficient value determined for the transportation of longshore sand along the deltaic lobes of the Ma River delta corresponds to 90 m2/day. This study offers a practical method for investigating morphological changes in cuspate deltas, especially when measured field data are limited.

Acute management of skin tears with mesh grafting: a prospective study and cost-benefit analysis

**Background**: Skin tears cause a significant burden to the patient and healthcare system. Acute management has traditionally comprised of operative debridement and formal skin grafting, which is costly, invasive and often followed by admission for five to seven days. In a 2014 pilot study by Vandervord and colleagues, a protocol for re-laying the skin tear as a meshed skin graft (mesh protocol) was proposed, which has not been validated to date. Our study aims to compare a prospective cohort to the original pilot study to determine validity in clinical practice and provide an updated cost-benefit analysis.**Method**: All patients who presented with acutely sustained skin tears at Northern Beaches Hospital, NSW, Australia, were prospectively entered into the mesh protocol as described by Vandervord and colleagues. An updated cost-benefit analysis was performed using a national hospital cost data collection report produced by the Independent Hospital Pricing Authority (IHPA).**Results**: We enrolled 53 patients onto the protocol who had sustained a total of 64 discrete skin tears, with 11 patients sustaining more than one skin tear. The average age of patients was 86, and the most common location of the skin tear was pretibial, followed by forearm/hand. Only one patient required a return to theatre for debridement and formal skin grafting, and three patients required long-term dressings for partial mesh graft loss. The cost to the healthcare system is consistent with the pilot study, with a significant difference between discharge from the emergency department post-procedure and formal grafting and admission for five to seven days.**Conclusion**: Use of the mesh protocol creates wound coverage and prevents the need for formal skin grafting, and reduces costs associated with formal operations and hospital admissions.

‘Grew Up with a Silver Spoon in My Mouth, But it Ended Up the Nose’: The Stigma and Labelling of Injection Drug Use in an Affluent Beachside Community

Criminological scholarship has long grappled with the roles that stigma and labelling play in drug use in disadvantaged communities. While stigma leads to marginalisation, less is known about the way stigma impacts the structurally advantaged, or those from communities of relative affluence. Our research involved fieldwork and 18 qualitative interviews with people who inject drugs in the affluent coastal community of Sydney’s Northern Beaches. We find that even when people occupy the ‘ideal’ class position, internalised stigma was present, but did not readily translate into labels involving a criminal self-concept. We also found that while the capacity to resist crime-related labelling processes and other forms of state intervention were limited by social positionality, some participants still had to contend with intersecting forms of gendered and racialized stigma. However, for white male participants, their status and that of the area were experienced as protective of their criminalisation, actively limiting criminal labelling processes.

The DynaDeep observatory – a unique approach to study high-energy subterranean estuaries

Subterranean estuaries are connective zones between inland aquifers and the open sea where terrestrial freshwater and circulating seawater mix and undergo major biogeochemical changes. They are biogeochemical reactors that modify groundwater chemistry prior to discharge into the sea. We propose that subterranean estuaries of high-energy beaches are particularly dynamic environments, where the effect of the dynamic boundary conditions propagates tens of meters into the subsurface, leading to strong spatio-temporal variability of geochemical conditions. We hypothesize that they form a unique habitat with an adapted microbial community unlike other typically more stable subsurface environments. So far, however, studies concerning subterranean estuaries of high-energy beaches have been rare and therefore their functioning, and their importance for coastal ecosystems, as well as for carbon, nutrient and trace element cycling, is little understood. We are addressing this knowledge gap within the interdisciplinary research project DynaDeep by studying the combined effect of surface (hydro- and morphodynamics) on subsurface processes (groundwater flow and transport, biogeochemical reactions, microbiology). A unique subterranean estuary observatory was established on the northern beach of the island of Spiekeroog facing the North Sea, serving as an exemplary high-energy research site and model system. It consists of fixed and permanent infrastructure such as a pole with measuring devices, multi-level groundwater wells and an electrode chain. This forms the base for autonomous measurements, regular repeated sampling, interdisciplinary field campaigns and experimental work, all of which are integrated via mathematical modelling to understand and quantify the functioning of the biogeochemical reactor. First results show that the DynaDeep observatory is collecting the intended spatially and temporally resolved morphological, sedimentological and biogeochemical data. Samples and data are further processed ex-situ and combined with experiments and modelling. Ultimately, DynaDeep aims at elucidating the global relevance of these common but overlooked environments.

Database records of koalas (Phascolarctos cinereus) in northern Sydney

This study examined records of koalas (Phascolarctos cinereus) in northern Sydney held in online biodiversity databases. There were 221 unique records distributed across the Northern Beaches, Ku-ring-gai, Hornsby and Hills Shire local government areas from 1788 to 2022, with records from the Northern Beaches local government area comprising 68% of this dataset. Records from the 1970s represented 41% of the dataset (90 records), while there were only 42 records from 2000 to 2022. Post-2000 records were spread broadly, showing no major contraction in distribution compared to the spread of earlier records, but with a notable absence of more recent records on the Barrenjoey Peninsula, a previously documented species stronghold. Substantial proportions of records were found in both protected reserves and privately-owned lands, which alludes to the value of the former but also shows that koala conservation in this capital city cannot rely solely on protected reserves. The 2000–22 records were widely distributed across 15 plant community types and areas of non-native vegetation, probably reflecting breeding and dispersal movements more than specific habitat selection. Possibly due to the same influences, none of the 2000–22 records were matched to areas represented by the Koala Habitat Suitability Model, a prediction model for spatial distribution of potential koala habitat across NSW, with a high habitat suitability score (greater than 0.85). We therefore recommend systematic on-ground surveys to clarify the patterns observed from the records.

Injection drug use in an affluent beachside community in Sydney: An exploratory qualitative study.

Social research on injection drug use has focussed on marginalised groups and communities, leaving a large gap in the field's understanding of how it is experienced in other settings, including in relatively affluent communities. This research is based on fieldwork and 18 in-depth qualitative interviews conducted in suburban beach-side communities in Sydney collectively known as the Northern Beaches. Participants did not experience stigmatisation by local health services as the norm or as a deterrent to access. Drug acquisition on the Northern Beaches occurred among closed networks of friends and acquaintances, and injecting use rarely occurred in public settings. Police contact was minimal, resulting in lower levels of criminalisation. Unlike many of the participants featured in the literature, our study participants grew up in middle and upper middle-class households, typically experiencing comfortable childhoods with little to no exposure to injection drug use. In this setting injection drug use operates covertly within the normal rhythms of middle-class life, hidden in amongst the bustle of cafés and shopping centres, and through the friendliness of neighbourhood driveway and doorstep interactions. Drug use is described as common in the area, with injecting behaviours stigmatised in ways that set it against the 'good' families and neighbourhoods of this beach-side enclave. In contrast to much of the Australian qualitative literature which frames injection drug use as a means of psychological relief or a subcultural norm, our participants described injecting as motivated by the desire to enhance pleasure and social connection.

Two seasons of tick paralysis in Victoria yet one season in Queensland and New South Wales, Australia

We studied 22,840 cases of tick paralysis in dogs and cats that were attributable to infestation with the eastern paralysis tick, Ixodes holocyclus. We report that the mortality rates from the holocyclotoxins of the tick or from euthanasia due to complications arising from tick paralysis in dogs and cats were 10% and 8%, respectively. The distribution of cases of tick paralysis among the 52 weeks of 22 years (1999 to 2020, inclusive) in four regions along the eastern coast of Australia revealed much about how the life-cycle of this tick varied among regions. The four regions in our study were: (i) Cairns, Innisfail, and surrounding postcodes in Far North Queensland; (ii) South East Queensland; (iii) Northern Beaches of Sydney in New South Wales; and (iv) the Shire of East Gippsland in Victoria. We found that the season of tick paralysis started earlier in more northerly latitudes than in more southerly latitudes. We also found that Victoria has two seasons of tick paralysis, one from approximately the third week of February to the first week of May, and another from approximately the third week of September to the third week of December, whereas all of the other regions we studied in eastern Australia only had one season of tick paralysis. When we studied the two seasons of tick paralysis in Victoria, we found a statistically significant negative correlation between the number of cases of tick paralysis between the two seasons: the more cases in one season, the fewer the cases in the next season. One possible explanation for the negative correlation may be immunity to I. holocyclus acquired by dogs and cats in the first season.

P25 - Building a Maternity Service Together

Collaborating with private organisations is becoming more common, as governments look to alternative approaches to provide high quality, cost effective public health care. On 30/31st October 2018 Manly and Mona Vale Hospitals closed simultaneously as the Northern Beaches Hospital opened, with staff and patients transitioning to the new hospital. The Northern Beaches Hospital was built and run as a private hospital, providing care to private and public patients (a Public-Private Partnership). This model has not been well researched in terms of maternity care, and within the wider Australian healthcare system. My research uses constructivist grounded theory to understand how the transition to the new hospital was accomplished by maternity services staff, and the women birthing in Northern Beaches Hospital. To date 27 interviews have been conducted with midwives and medical staff who transitioned to the Northern Beaches Hospital, and women who birthed in the first six months of opening. Using Grounded Theory, the preliminary analysis has found an overarching theme: “Protecting community”. This theme covered all participant groups, with differences in terms of what ‘community’ meant to the individual. The presentation will provide context around the Public-Private Partnership model, and expand on the ‘Protecting community’ theme to give a clear understanding of the strength and meaning this had to the participants. If governments continue to engage in major public private hospital projects it is imperative that we understand the affects on the staff and consumers so that we can attempt to mediate and limit any adverse outcomes and trauma.

New Record of the Pelagic Octopods Argonauta argo (Linnaeus, 1758) off the Shore of the Northern Tip of the Gulf of Aqaba in Jordan

A few specimens of the pelagic octopod Argonauta argo (Linnaeus, 1758) were found after they were washed up by currents along the northern beach of the Gulf of Aqaba in Jordan. This article describes this record and provides a review of the species’ sightings worldwide and their importance as prey in maintaining an ecological balance.

Dispersal of a small wave-protected river plume from drifter observations

Using low-cost surface drifters, this study investigates the influence of the Buranhém River plume on the coastal region of the city of Porto Seguro (in the state of Bahia). The results highlight the importance of small river plumes on the coastal region and their possible influence on tourist beaches and high biodiversity regions. Three drifters, mounted with GPS receivers and temperature and salinity sensors, were simultaneously released into the mouth of the river in six experiments between December 2019 and December 2020, during ebbing spring tides. In each experiment, vertical salinity profiles were measured hourly at the position of the central drifter for 5 h, in order to investigate the along-track stratification of the plume. Results show that there are two distinct dispersion patterns in the Buranhém River plume, and that they are controlled mainly by wind and river discharge. Southward (northward) dispersion with curvilinear shape forced by northeasterly (south and southwesterly) winds were observed during the experiments. The maximum vertical salinity gradient confirmed the shallow character of the river plume (< 3 m in depth), more highly stratified during high river discharge and northward dispersion than in the opposite situation of northeasterly winds and low and medium river discharge. The results suggest that the Buranhém River plume has a larger influence over the northern beaches of Porto Seguro, with its reach being defined by the river discharge. Beaches to the south of the river inlet are less influenced by the river plume. Such unprecedented findings form the background for future studies and for management of this highly visited tourist area in Brazil.

Spatial Variability of the ‘Airbnb Effect’: A Spatially Explicit Analysis of Airbnb’s Impact on Housing Prices in Sydney

Over the last decade, the emergence and significant growth of home-sharing platforms, such as Airbnb, has coincided with rising housing unaffordability in many global cities. It is in this context that we look to empirically assess the impact of Airbnb on housing prices in Sydney—one of the least affordable cities in the world. Employing a hedonic property valuation model, our results indicate that Airbnb’s overall effect is positive. A 1% increase in Airbnb density is associated with approximately a 2% increase in property sales price. However, recognizing that Airbnb’s effect is geographically uneven and given the fragmented nature of Sydney’s housing market, we also employ a GWR to account for the spatial variation in Airbnb activity. The findings confirm that Airbnb’s influence on housing prices is varied across the city. Sydney’s northern beaches and parts of western Sydney experience a statistically significant value uplift attributable to Airbnb activity. However, traditional tourist locations focused around Sydney’s CBD and the eastern suburbs experience insignificant or negative property price impacts. The results highlight the need for policymakers to consider local Airbnb and housing market contexts when deciding the appropriate level and design of Airbnb regulation.

Popularity of Australian beaches: Insights from social media images for coastal management

Coastal landscapes such as beaches are popular as they provide a range of leisure opportunities for locals and tourists, with people increasingly sharing these experiences on social media. Researchers have started to harness social media data to assess how people engage with coastal landscapes but most studies are at local scales. We expand this approach by examining the popularity of close to 12,000 beaches across Australia including temporal, spatial, text and sentiment analysis including Generalized Linear Models. Metadata associated with 32,383 images from Flickr tagged “beaches” and “Australia” posted by 1,254 Australians, and 1,154 international tourists were obtained. With images representing around 9,000 visitor days and covering 33% of the 60,000 km coastline, differences were apparent where Australians were more likely to visit beaches on weekends than weekdays and northern beaches in winter but southern beaches in summer: factors that were less important for international tourist. Australians were also more likely to post images of beaches in capital cities and tagged them with words relating to natural features, while international tourists also posted images of urban and more remote beaches and tag them with geographical locations. The text of tags reinforced how some Australian beaches are very popular and that they are predominantly associated with positive emotions. Despite limitations associated with these methods, the results highlight how social media data can be used to complement other approaches for large scale monitoring of coastal landscapes including identify priority areas for active management using a rapid, remote and low-cost approach.

The failure of NSW coastal management reform

In New South Wales (NSW), Australia, awareness of coastal erosion and shoreline recession had its genesis in the late 1920s when storms damaged houses at Collaroy one of Sydney’s northern beaches (Figure 1). At about the same time the Coogee “Fun” Pier, located on a southern Sydney beach and built between 1924 and 1928, was so damaged by wave attack that the remains had to be removed in 1934. Again in 1945 a new seawall at Cronulla, another southern Sydney beach, was damaged beyond repair and at the same time more houses were lost at Collaroy. This was followed in 1967, 1974, and 1978 by major erosion events that threatened both houses and high-rise buildings at Collaroy, resulted in the loss of houses at Bilgola, a northern Sydney beach and in 1978 the loss of houses at Wamberal, 46 km north of Sydney Harbour (Table 1). Unlike the United States of America (USA) where coastal management comes under both federal and state jurisdictions, in Australia it is the province of the governments of each of the states. The federal government does provide some aspirational guidance, but not significant legislative or financial support. There is also no equivalent to the U.S. Army Corps of Engineers to provide project delivery services. In Australia, the states devolve delivery down to local councils through Acts of Parliament and formal policies that can also have legislative force. However, the failure of the State of NSW to provide all the legislative tools necessary to effectively manage coastal matters at a local council level results in coastal management being abdicated rather than delegated by the state, particularly in relation to private development.

Insular Peninsularities: Geography, demography and local identity in Sydney’s Northern Beaches and Sutherland Shire

In recent years there has been consideration of some peninsular areas as ‘almost-islands’ (presqu'îles, in French usage). Assertion of such status has usually relied on spatial configuration and the nature of transport links and/or border issues between the areas in question and adjacent regions. Bodies of land that are connected to mainlands by narrow isthmuses have been particularly prone to characterisation as ‘almost-islands’ but, to date, factors such as the perceived insularity of particular peninsulas within larger metropolitan areas have not featured as prominently in discussions. This article emphasises the latter with regard to the types of insularity perceived within two areas of Australia’s largest city, Sydney: its Northern Beaches and Sutherland Shire. These areas have been referred to in local and metropolitan media as ‘insular peninsulas’, a term distinctive to Australian English Language usage. Both are also known for their attractive beaches and swimming and surfing opportunities, factors that have contributed to local territorialism and related social tensions. Consideration of these two areas contributes to more general discussions of insular peninsularity by emphasising nuanced gradations involving factors such as socio-cultural homogeneity, local identity and perceived territorial rights.