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  1. Experimental Analysis of Nest-Site Choice and its Relationship to Nest Success in an Open-Cup–Nesting Passerine

    Nest placement presumably reflects selection for secure sites to minimize failure. Most tests of this hypothesis, however, have failed to support it. We used artificial nests (ARTs) to experimentally evaluate...

  2. Lactic dehydrogenase isozyme isolation by disc electrophoresis in eight species of fringillid birds

    Disc electrophoresis of tissue homogenates from eight species of fringillid birds showed five forms of lactic dehydrogenase. The relative amounts of isozymes were characteristic for each species. This paper...

  3. The Effects of Urbanization and Human Disturbance Upon Plant Community Structure and Bird Species Richness, Diversity, and...

    The effects of urbanization and continual human disturbance on the plant and avian communities of Forest Park and forested lands surrounding Portland, Oregon, were studied. I examined characteristics of plant...

  4. Winter Diet of Bobolink, a Long-Distance Migratory Grassland Bird, Inferred from Feather Isotopes

    Effective conservation of migratory bird populations depends on advancements in our understanding of processes throughout the life cycle. Fundamental information about wintering ecology (e.g., habitat use and...

  5. Lifetime reproductive Success of Female Eastern Kingbirds (Tyrannus Tyrannus): Influence of Lifespan, Nest Predation and Body...

    I report on the lifetime reproductive success (LRS) of female Eastern Kingbirds (Tyrannus tyrannus) in central New York. I investigated the major correlates of LRS and specifi cally tested the hypothesis that...

  6. The Breeding Biology of the Northern Pygmy Owl: Do the Smallest of the Small Have an Advantage?

    We explored the breeding biology of the Northern Pygmy-Owl (Glaucidium gnoma) from 2007 to 2009 in a forested reserve in Portland, Oregon. Large body size is often assumed to give animals reproductive...

  7. Using Landsat TM Imagery to Monitor Vegetation Change Following Flow Restoration to the Lower Owens River, California

    Rehabilitating river corridors to restore valuable riparian habitat consumes significant resources from both governments and private companies. Given these considerable expenditures, it is important to monitor...

  8. Breeding success and nest site characteristics of the western bluebird on Parrett Mountain

    The lack of suitable nest sites may be a limiting factor for Western Bluebird populations inhabiting the upper Willamette Valley. Nest box trails have been established on the hills surrounding the Portland...

  9. The Gate and Other Stories

    The Gate is a collection of short stories by Cassondra Bird Combs. Combs' first collection is heavily inspired by the small Northern California towns she grew up in, and the disillusioned characters who live...

  10. A Flux-Focusing Cycloidal Magnetic Gearbox

    This paper investigates the performance of a -25:1 gear ratio cycloidal magnetic gearbox (CMG) with a flux-focusing rotor topology. The performance of the CMG is investigated by conducting an iterative...

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