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Filtering by: Subject Birds -- Oregon -- Geographical distribution

Distribution and population estimates of marbled murrelets at sea in Oregon during the summers of 1992 and 1993 : final report

Creator:

Strong, Craig S. and Oregon. Department of Fish and Wildlife

Abstract:

"In the past 6 years research effort on the Marbled Murrelet (Brachyramphus marmoratus) has increased in response to an apparent dramatic decline in their numbers on the west coast south of British Columbia (Marshall, 1988, Carter and Erickson 1992, Nelson et al. 1992). Their recent listing as a federally threatened...

Resource Type:

Technical Report
Habitat associations of bird communities in shrub-steppe and western juniper woodlands

Creator:

Reinkensmeyer, Daniel P.

Abstract:

The encroachment of western juniper into mountain big sagebrush plant communities and the subsequent development of juniper stands results in significant changes in vegetation structure and complexity. This study described and compared vegetative structure and bird community measures among four cover types representing a broad range of structural stages among...

Resource Type:

Masters Thesis
Habitat use and densities of cavity-nesting birds in the Oregon Coast Range

Creator:

Nelson, S. Kim

Abstract:

I studied abundance patterns and habitat use of eight cavitynesting bird species in the Coast Ranges of Western Oregon during the spring and summer of 1985 and 1986. Three age classes of unmanaged Douglas-fir (Pseudotsuga menziesii) stands were selected for study: young (40-80 yrs), mature (80-200 yrs), and old-growth (>200...

Resource Type:

Masters Thesis