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Winter Behavior And Ecology Of Eastern Bluebirds (Sialia Sialis): Home Ranges, Habitat Use, And Effect Of Weather On Foraging Behavior, Todd J. Weinkam
Winter Behavior And Ecology Of Eastern Bluebirds (Sialia Sialis): Home Ranges, Habitat Use, And Effect Of Weather On Foraging Behavior, Todd J. Weinkam
Online Theses and Dissertations
Eastern bluebirds (Sialia sialis) are widespread across eastern North America, but populations appear to be susceptible to extreme winter weather. Declines in population following cold winters in states like Kentucky suggest the need to better understand winter-specific habitat requirements and behavioral responses to inclement weather. My objectives were to 1) describe the size and habitat composition of the home ranges of wintering bluebirds, and 2) examine the effects of weather (i.e., temperature, wind speed, and snow presence) on habitat occupancy, group size, and foraging behavior. My study was conducted at the Blue Grass Army Depot in Madison County, …
Wintering White-Throated Sparrows (Zonotrichia Albicollis): Home Ranges, Aggression And Corticosterone, Marissa Ann Buschow
Wintering White-Throated Sparrows (Zonotrichia Albicollis): Home Ranges, Aggression And Corticosterone, Marissa Ann Buschow
Online Theses and Dissertations
White-throated sparrows (Zonotrichia albicollis) are songbirds that spend the non-breeding season in southeastern North America, where they form philopatric territorial flocks. Flocks exhibit dominance hierarchies, with dominance rank associated with an individual's age and prior residence in the territory. Although social behaviors within flocks are well studied, few studies have described winter home ranges. I tagged white-throated sparrows (n = 12) in Madison County, Kentucky, with 0.9-g radio transmitters during the winter of 2010-2011. Locations were entered into ArcGIS and home range sizes were estimated with 50% and 95% kernel analysis for individuals with at least five locations. Mean core …