| Abstract: | Maps generated from bird survey data are used for a variety of scientific purposes, but little is known about their bias and precision. We review methods for preparing maps from point count data and appropriate sampling methods for maps based on point counts. Maps based on point counts can be affected by bias associated with incomplete counts, primarily due to changes in proportion counted as a function of observer or habitat differences. Large-scale surveys also generally suffer from regional and temporal variation in sampling intensity. A simulated surface is used to demonstrate sampling principles for maps. |
| Genre: | Book chapter |
| ProdID: | 5210521 |
| Citation Author: | Sauer, J.R.; Pendleton, G.W.; Orsillo, S. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation Editor: | Ralph, C.J.; Sauer, J.R.; Droege, S. (editors) |
| Citation End Page: | 160 |
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| Citation Language: | English |
| Citation Larger Work Title: | Monitoring Bird Populations by Point Counts. |
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| Citation Phsyical Description: | iv, 181 |
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| Citation Public Comments: | PDF on file: 4841_Sauer.pdf |
| Citation Publisher: | U.S. Forest Service, Pacific Southwest Forest Experiment Station. |
| Citation Series: | General Technical Report |
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| Citation Search Results Text: | Mapping of bird distributions from point count surveys; 1995; Book chapter; Monitoring Bird Populations by Point Counts. ; Sauer, J.R.; Pendleton, G.W.; Orsillo, S. |
| Citation Start Page: | 151 |
| Citation Volume: | |
| Citation Year: | 1995 |
| Type: | citation/reference |
| Text: | Mapping of bird distributions from point count surveys; 1995; Book chapter; Monitoring Bird Populations by Point Counts. ; Sauer, J.R.; Pendleton, G.W.; Orsillo, S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (INDEX PAGE): | http://www.treesearch.fs.fed.us/pubs/31754 |
| Date Other: | Tue, 9 Jun 2009 09:23 -0500 |
| Publisher: | U.S. Forest Service, Pacific Southwest Forest Experiment Station. |
