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.
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Showing 1 to 8 of 8 for “"willow flycatcher"”.
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Foraging habitat niche comparisons and foraging behavior of seven species of flycatchers in southwest Virginia
… foraging behavior for seven species of Tyrannid flycatchers were measured to examine interspecific habitat resource partitioning, niche breadth and niche overlap. Four of the species inhabited forested areas; Great Crested Flycatcher, Eastern Wood Pewee, Least Flycatcher and Acadian Flycatcher. …
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Aspects of ecosystem health in the Colorado River Delta, Mexico
… from the Colorado River. The southwestern willow flycatcher (Empidonax traillii extimus ) is an endangered neotropical migrant with only 300-500 breeding pairs. The objective of the second study was to determine the presence/absence of this bird in the Colorado River delta. Surveys were …
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Habitat selection, food availability, and reproductive success of southwestern willow flycatchers on the South Fork Kern River, California
The southwestern willow flycatcher (Empidonax traillii extimus) is a federally-endangered neotropical migrant that breeds in the southwestern United States. The population of southwestern willow flycatchers on the South Fork Kern River in California was once thought to be one of the largest E. t. …
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Fantastic Birds and Where to Find Them
… nonbreeding habitat of the western subspecies of Willow Flycatchers (Empidonax traillii subspp.), including the federally endangered Southwestern Willow Flycatcher (Empidonax traillii extimus), with a range-wide species distribution model. The three western subspecies of Willow Flycatchers migrate …
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Hydraulic and geospatial analyses of stream engineering and habitat restoration near Los Lunas, NM
… minnow (Hybognathus amarus) and the Southwestern willow flycatcher (Empidonax traillii extimus), by restoring a natural inundation regime to the overbank area. This inundation regime provides spawning and rearing habitat for the minnow in addition to promoting native vegetation over non-native and …
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Nesting ecology and conservation of shrubland birds in a fragmented urbanized landscape in northeastern Illinois
… was one of the most successful species; Willow Flycatcher (Empidonax traillii) was one of the least successful, and failure rates were higher than some reported from rural, agricultural areas in Illinois. Species-specific variation existed in the types of trees and shrubs used for nesting …
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Population Dynamics of Willow Flycatchers in the Sierra Nevada
In the western United States, Willow Flycatcher (Empidonax traillii) populations have declined, and the magnitude of these declines varies across the species range likely because of ecological differences among subspecies and variation in biotic and abiotic factors. Three subspecies of Willow …
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Habitat use, population size, and nesting ecology of conservation priority bird species using restored fields in agricultural landscapes
… population goals for the Bell’s Vireo and Willow Flycatcher, but more than 10 times the current amount of restored habitat would be required to achieve the population goal for the Field Sparrow and Northern Bobwhite. Lastly, analyses related to my third question demonstrated that nesting …