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Full-Text Articles in Life Sciences
Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (Tachycineta Bicolor), Natalia May Maass
Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (Tachycineta Bicolor), Natalia May Maass
Online Theses and Dissertations
Some species of birds have alarm calls that are functionally referential and provide their nestlings with information about the level of threat predators may pose. Although several investigators have examined the responses of nestlings of species with open-cup nests to the anti-predator calls of adults, few have conducted such studies with cavity-nesting species of birds. Therefore, the objectives of my study were to examine the vocal responses of cavity-nesting adult Tree Swallows (Tachycineta bicolor) to different nest predators, some able and others unable to enter nest cavities, and to examine the responses of nestlings to those vocalizations. My study was …
Habitat Use And Nightly Activity Patterns Of Bats On A Military Landscape In Western Kentucky, Carson E. Mcnamara
Habitat Use And Nightly Activity Patterns Of Bats On A Military Landscape In Western Kentucky, Carson E. Mcnamara
Online Theses and Dissertations
Bat populations of eastern North America continue to decline due to the cumulative effects of White-nose Syndrome, habitat loss, and anthropogenic disturbances across the landscape. Unique stressors exist on military installations, such as noise created during training activities. Given the scarcity of data that exists for these widespread ownerships, I created predictive models for nightly bat activity related to local habitat, landscape, and military use parameters. Bat activity was assessed during the summers of 2016 and 2017 using full-spectrum acoustic detectors across the Wendell H. Ford Regional Training Center (WHFRTC), a ca. 4200 ha military landscape in the Interior Rivers …
Vocalizations Of Adult American Kestrels (Falco Sparverius): Effect Of Breeding Stage, Sex, And Context On Call Use And Characteristics, Mark Winland
Online Theses and Dissertations
American Kestrels (Falco sparverius) are small falcons with a vocal repertoire known to consist of three different vocalizations: whine, chitter, and klee calls. However, the characteristics and contextual use of these calls have not been quantified. To determine the characteristics of these calls and better understand possible functions, I conducted a combined observational and experimental study of American Kestrels in Madison County, Kentucky, from February to July 2013. I observed kestrels and recorded all vocalizations uttered by males and females during different breeding stages and different behavioral contexts. In addition, I conducted playback experiments using the whine, chitter, and klee …