| Abstract: | A bird census method is presented that is designed for tall, structurally complex vegetation types, and rugged terrain. With this method the observer counts all birds seen or heard around a station, and estimates the horizontal distance from the station to each bird. Count periods at stations vary according to the avian community and structural complexity of the vegetation. The density of each species is determined by inspecting a histogram of the number of individuals per unit area in concentric bands of predetermined widths about the stations, choosing the band (with outside radius x) where the density begins to decline, and summing the number of individuals counted within the circle of radius x and dividing by the area (Bx2). Although all observations beyond radius x are rejected with this procedure, coefficients of maximum distance. |
| Genre: | Article |
| ProdID: | 5221568 |
| Citation Author: | Reynolds, R.T.; Scott, J.M.; Nussbaum, R.A. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 313 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Condor |
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| Citation Number Of Pages: | 5 |
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| Citation Phsyical Description: | 309-313 |
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| Citation Search Results Text: | A variable circular-plot method for estimated bird numbers; 1980; Article; Journal; Condor; Reynolds, R.T.; Scott, J.M.; Nussbaum, R.A. |
| Citation Start Page: | 309 |
| Citation Volume: | 82 |
| Citation Year: | 1980 |
| Type: | citation/reference |
| Text: | A variable circular-plot method for estimated bird numbers; 1980; Article; Journal; Condor; Reynolds, R.T.; Scott, J.M.; Nussbaum, R.A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://elibrary.unm.edu/sora/Condor/files/issues/v082n03/p0309-p0313.pdf |
| Date Other: | Wed, 16 Jun 2010 12:19 -0500 |
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