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Showing 1 to 13 of 13 for “"bluebirds"”.
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Laying-Sequence Variation in Yolk Carotenoids of Eastern Bluebirds
… and egg metrics of nine full clutches of Eastern Bluebirds (<em>Sialia sialis</em>) in Columbus, Georgia. I predicted that Eastern Bluebirds would exhibit a brood reduction strategy, with the first-laid eggs containing a higher concentration of carotenoids than the last-laid eggs. I also predicted …
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Mercury's Effects on Feather Color and Fitness of Eastern Bluebirds
… are affecting wildlife, specifically Eastern Bluebirds (Sialia sialis). The goal of this research was to explore a novel method through which mercury may be affecting the fitness of Eastern Bluebirds exposed to varying levels of environmental mercury. Birds on contaminated and reference sites …
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Utilization of natural nest sites by Eastern Bluebirds in southwestern Virginia
Eastern Bluebirds (<i>Sialis sialis</i>) were found to be utilizing natural nest sites in the vicinity of Blacksburg, Virginia, during 1976 and 1977. Forty-seven natural nest sites, 37 in fencepost cavities and ten in tree cavities were discovered by driving roads in rural areas, scanning fencerows …
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Effect of nestling sex ratio on the provisioning behavior of adult Eastern Bluebirds (Sialia sialis)
… has been reported in one population of Eastern Bluebirds (<em>Sialia sialis</italic>) and attributed to local resource competition. To better understand this behavior, I studied the provisioning behavior of Eastern Bluebirds in Madison County, Kentucky, in 2004. I experimentally manipulated …
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Effect of predator type, season, brood size, and West Nile Virus infection on the nest defense behavior of male and female Eastern Bluebirds
… nest defense behavior of male and female Eastern Bluebirds (Sialia sialis). Eastern Bluebirds were studied from March to August 2003 at the Blue Grass Army Depot. Adult and nestling Bluebirds were captured, measured, banded, and blood was drawn. Nest defense was examined when nestlings were 15-18 …
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Winter Behavior and Ecology of Eastern Bluebirds (<i>Sialia sialis</i>): Home Ranges, Habitat Use, and Effect of Weather on Foraging Behavior
<p>Eastern bluebirds (<em>Sialia sialis</em>) 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 …
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Vocal responses of adult Eastern Bluebirds (Sialia sialis) to potential nest predators and the behavioral responses of nestlings
… objectives of my study of cavity-nesting Eastern Bluebirds <em>(Sialia sialis)</em> were to examine (1) the vocal responses of adult Eastern Bluebirds to different predators, and (2) the behavioral responses of nestlings to those adult vocalizations. My study was conducted from April - July 2013 …
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Possible Role Of Breeding Phenology, Brood Size, And Male Parental Care On The Number Of Nesting Attempts By Female Eastern Bluebirds, A Facultatively Multibrooded Species
… the number of nesting attempts by female Eastern Bluebirds (Sialia sialis) during a single breeding season. My study was conducted at the Blue Grass Army Depot in Madison County, Kentucky, from mid-March to mid-August 2018. I monitored the nests of 39 first broods, 34 second broods, and eight …
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Incubation behavior, embryonic heart rate, and developmental variation within and among altricial bird species
… however, the two cavity nesting species, Eastern Bluebirds (Sialis sialis) and Tree Swallows (Tachycineta bicolor), exhibited lower EHR than the other species, while Dickcissels (Spiza americana) exhibited higher EHR than other species. Eastern Bluebirds also displayed greater nest temperature …
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Parental Investment and Male Ornamentation in the Eastern Bluebird (Sialis Sialis)
… structural plumage coloration in male Eastern Bluebirds (Sialia sialis). I found there was no correlation between nestling provisioning and nest defense for males or females. Males with brighter UVblue plumage tend to provision nestlings at higher rates and more-ornamented males tend to defend …
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The Consequence of Anthropogenic Disturbance on Communication and the Operation of Sexual Selection in the Eastern Bluebird (Sialia Sialis)
… whether nestling mouth coloration in Eastern bluebirds (Sialia sialis) was a signal of quality, and if a parents ability to discriminate among the mouth coloration of their nestlings was affected by level of human disturbance. I found that the perceived color contrast of nestling mouths …
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Habitat use by wintering passerines in fire-managed forests along the U.S. Gulf Coast
… Nuthatches, Pine Warblers, and Eastern Bluebirds) and open habitats have the strongest responses to fire management. Kinglets also responded to changes in habitat by demonstrating differing abundances and evidence of segregation among age/sex classes, but these differences were not …