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- Birds -- Effect of wind power plants on (1)
- Eastern kingbird -- Behavior -- Oregon -- Malheur National Wildlife Refuge (1)
- Eastern kingbird -- Habitat -- Oregon -- Malheur National Wildlife Refuge (1)
- Eastern kingbird -- Oregon -- Malheur National Wildlife Refuge -- Population (1)
- Eastern kingbird -- Reproduction (1)
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- Towhees -- Habitat -- Oregon -- Portland (1)
- Towhees -- Infancy -- Mortality -- Oregon -- Portland (1)
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The Biology Of Eastern Kingbirds At Malheur National Wildlife Refuge: Survival, Reproduction, And Testosterone Secretion, Lucas J. Redmond
The Biology Of Eastern Kingbirds At Malheur National Wildlife Refuge: Survival, Reproduction, And Testosterone Secretion, Lucas J. Redmond
Dissertations and Theses
This dissertation presents the results of a study that I undertook to better understand the breeding biology of Eastern Kingbirds (hereafter, kingbirds) at Malheur National Wildlife Refuge in southeastern Oregon from 2003 to 2009. Kingbirds are long-distance migratory songbirds that breed across much of North America. This species is socially monogamous but, via frequent extra-pair copulations, is genetically polygamous. Kingbirds exhibit relatively high breeding site fidelity, often returning to the same tree to nest in subsequent years. Both members of a pair provide parental care, but there are often specific duties performed by both male and female kingbirds. For example, …
Application Of Gis And Spatial Analysis Of Golden Eagle Fatalities Caused By Wind Turbines At The Altamont Pass Wind Resource, Andrew James Pinger
Application Of Gis And Spatial Analysis Of Golden Eagle Fatalities Caused By Wind Turbines At The Altamont Pass Wind Resource, Andrew James Pinger
Dissertations and Theses
The Altamont Pass Wind Resource Area (Altamont) near Livermore, California is the oldest and largest wind farm in the United States. It is known as a location of high avian mortality, especially for diurnal raptors such as the Golden Eagle (Aquila chrysaetos). Using the avian monitoring data collected at Altamont for over thirteen years (1998-2003, 2005- 2011), records were analyzed of 134 golden eagle deaths caused by wind turbine collisions. All wind turbines present during the same temporal range were characterized according to turbine variables, and geographic placement characteristics. Values of turbines that killed golden eagles were compared to values …
Postfledging Survival And Habitat Use Of Spotted Towhees (Pipilo Maculatus) In An Urban Park, Amy Ann Shipley
Postfledging Survival And Habitat Use Of Spotted Towhees (Pipilo Maculatus) In An Urban Park, Amy Ann Shipley
Dissertations and Theses
Habitat fragmentation, and the resulting increase in edge habitat, has important effects on birds, including the increased probability of nest predation, changes in habitat structure, and the increased presence of non-native plant species. It is critical to understand the effects of fragmentation at all stages of the avian life cycle, including the often overlooked postfledging period. Because much of juvenile mortality occurs during the immediate postfledging period, and juvenile mortality contributes substantially to population dynamics, it is necessary to understand if fledgling survival is reduced in edge habitats and if fledglings' survival is influenced by their habitat use. During 2008 …
Possible Avian Influences In The Distribution Of Dwarf Mistletoe, Paul James Zilka
Possible Avian Influences In The Distribution Of Dwarf Mistletoe, Paul James Zilka
Dissertations and Theses
The goal of this investigation was to determine the potential of birds as vectors for the movement of dwarf mistletoe seeds and the means by which such movement could occur. Birds would greatly speed the rate at which these parasites move horizontally or vertically through the forest. Five areas in Oregon, heavily infected by six species of Arceuthobium were studied. Observations of avian behavior point to 13 species whose general behavior make them potential vectors in the distribution of these parasites. More specifically, the roosting and subsequent bathing behavior of most forest birds proves a very important means of potential …