Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"American kestrels"”.
-
American Kestrels (Falco sparverius) may use tail-pumping to maintain balance
… several species of small falcons, including American Kestrels (Falco sparverius), often pump their tails, but the possible function of this behavior is unknown. My objective was to use observations and experiments to examine the possible function(s) of tail-pumping by American Kestrels. …
-
Factors Associated with Space Use and Reproductive Success of American Kestrels in Northern Virginia, USA
… of species. My thesis evaluated the space use of American kestrels (Falco sparverius), a species of conservation concern, and tested whether their movement behavior was associated with sex-specific parental roles, local resource availability, and central-place foraging theory as a framework for …
-
Reproductive Success of American Kestrels (<em>Falco sparverius</em>) Nesting in Boxes along an Interstate in Northeastern Tennessee.
… box programs provide supplemental nest sites for American Kestrels, <em>Falco sparverius</em>. When the availability of nest sites is a limiting factor, the addition of nest boxes can increase local breeding populations. These programs also facilitate the collection of data on breeding …
-
Variation in mass and wing loading of nestling American Kestrels: possible effects of nestling behavior and adult provisioning behavior
… My objective was to examine the mass of nestling American Kestrels (Falco sparverius) during the mid- to late nestling period and specifically to determine the possible effects of attaching small lead weights (3gm and 6gm) to some nestlings. If wing loading at fledging is important for nestling …
-
Vocalizations Of Adult American Kestrels (falco Sparverius): Effect Of Breeding Stage, Sex, And Context On Call Use And Characteristics
<p>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 …
-
Effect of variation in nestling hunger levels on the begging behavior of nestlings and the provisioning behavior of adult American Kestrels
… to manipulate the begging intensity of nestling American Kestrels (Falco sparverius) and examine the responses of adult males and females. I studied 12 pairs of kestrels nesting in nest boxes from 1 March to 1 July 2014 at the Blue Grass Army Depot, Madison County, Kentucky. Nest boxes were …
-
Reproductive Success of Southeastern American Kestrels (Falco Sparverius Paulus) Nesting in 230Kv Transmission Towers and Alternative Nest Structures in South-Central Georgia
… of the threatened southeastern subspecies of the American Kestrel (Falco sparverius paulus). Numbers of Southeastern American Kestrels are estimated to have declined by more than 80% over the last fifty years in the southeastern United States. In Georgia, populations have nearly disappeared below …
-
Influence of Predation on Least Tern and Piping Plover Productivity Along the Missouri River in South Dakota
… and site observations indicated that American kestrels (Falco sparyerius), American crows (Corvus brachyrhynchos), raccoons (Procyon lotor), great horned owls (lma.Q yirginianus), and mink (Mustela yison) were having a significant effect on the survival of piping plover and least tern …
-
Perceived Predation Risk And The Responses Of Adult And Nestling Tree Swallows (tachycineta Bicolor)
… chipmunk (Tamias striatus), a study skin of an American Kestrel (Falco sparverius), and a rubber model of a black rat snake (Pantherophis obsoletus), as well as a study skin of an American Robin (Turdus migratorius) used as a control. Experiments began at nests when nestlings were 12 or 13 days …
-
Vocal responses of Blue Jays (Cyanocitta cristata) to raptors that differ in predatory threat
… revealed that two species in the corvid family, American Crows (Corvus brachyrhynchos) and Siberian Jays (Perisoreus infaustus), use referential calls to convey information about predator presence and level of threat. Because of their intelligence and flocking behavior, Blue Jays, like American …
-
Biology and conservation of the endangered Bahama Swallow (Tachycineta cyaneoviridis)
… habitat face competition for cavities with American Kestrels (Falco sparverius), and non-native House Sparrows (Passer domesticus) and European Starlings (Sturnus vulgaris). These results highlight the importance of pine forest and the Hairy Woodpecker for the persistence of the swallow.