| Abstract: | Continental populations of most bird species have remained quite stable since 1966, but there have been many regional changes associated with migration disasters, breeding failures and range expansions, and a few dramatic increases in populations of introduced species. These changes often are better represented by curvilinear than by linear regressions. |
| Genre: | Article |
| ProdID: | 5220989 |
| Citation Author: | Bystrak, D.R.; Robbins, C.S. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 143 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Polish Ecological Studies |
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| Citation Number Of Pages: | 13 |
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| Citation Phsyical Description: | 131-143 |
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| Citation Search Results Text: | Bird population trends detected by the North American breeding bird survey; 1977; Article; Journal; Polish Ecological Studies; Bystrak, D.R.; Robbins, C.S. |
| Citation Start Page: | 131 |
| Citation Volume: | 3 |
| Citation Year: | 1977 |
| Type: | citation/reference |
| Text: | Bird population trends detected by the North American breeding bird survey; 1977; Article; Journal; Polish Ecological Studies; Bystrak, D.R.; Robbins, C.S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
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