Abstract
Marshes are simple, two-dimensional habitats that provide little opportunity for ecological specialization. This situation has most likely favored the evolution of interspecific aggression between red-winged blackbirds and marsh wrens. Redwings of both sexes are aggressive towards marsh wrens; however, the rate of redwing–wren agonistic interactions is determined by at least three factors: (i) sex of redwings (most interactions involved males); (ii) time of day (the rate of interactions is determined by territorial and foraging activities of these birds); and (iii) density of marsh wrens in an area (the rate of interactions increased with increasing density of marsh wrens in different areas). Since a consequence of this redwing aggression towards marsh wrens is partial interspecific territoriality, this behavior has presumably evolved as a mechanism reducing interference competition with marsh wrens.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
