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 metropolitan area. Since their placement, approximately 25% of the boxes available have been u...
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| Format: | Others |
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PDXScholar
1983
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| Online Access: | https://pdxscholar.library.pdx.edu/open_access_etds/3395 https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=4406&context=open_access_etds |