Search Constraints

Start Over
Filtering by: Subject Northern pygmy owl -- Ecology -- Oregon Remove constraint Subject: Northern pygmy owl -- Ecology -- Oregon

Search Results

  • Distribution and habitat associations of the northern pygmy-owl in Oregon

    Creator:
    Sater, Dawn M.
    Abstract:
    I conducted acoustic lure surveys of northern pygmy-owls (Glaucidium gnoma) on transects that were systematically placed in forested areas throughout the state of Oregon. My objectives were to determine if pygmy-owls were associated with particular forest types, ecoregions, or with large-diameter dominant overstory trees. I also examined temporal variation in...
    Resource Type:
    Masters Thesis
    Full Text:
    Associations of the Northern Pygmy-owl in Oregon. Abstract approved: Eric D. Forsman I conducted acoustic

  • Competitive interactions and resource partitioning between northern spotted owls and barred owls in western Oregon

    Creator:
    Wiens, J. David
    Abstract:
    The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted...
    Resource Type:
    Dissertation
    Full Text:
    northern spotted owl began as early as early as 1973 in Oregon, but the sub-species was not listed