| Abstract: | From 1993-1995, we located and monitored 601 Acadian Flycatcher (Empidonax virescens) nests in a large contiguous tract of bottomland hardwood forest on the White River National Wildlife Refuge, Arkansas. Annual reproductive success was significantly different among years; ranging from 10-25% (Mayfield estimate) over the three years of the study. There was no significant difference in nest success among study plots, with nesting success showing a trend of increasing late in the breeding season. Clutch size for non-parasitized nests averaged 2.9 ? 0.02 (SE) eggs with a mode of 3. Rates of Brown-headed Cowbird (Molothrus ater) parasitism were low (21%), accounting for 7% of all nest failures. However, parasitism by cowbirds resulted in a reduction of clutch size for nests initiated early (i.e., first nests and replacements) in the breeding season. Predation was the leading cause of nest failures, accounting for 75% of all failures. Snakes and avian predators were thought to be the leading cause of nest failures. Although additional factors must be investigated, preliminary results indicate that nest predation is a major influence on this population, despite the size of the forest tract. |
| Genre: | Article |
| ProdID: | 5223800 |
| Citation Author: | Wilson, R.R.; Cooper, R.J. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 232 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Wilson Bulletin |
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| Citation Number Of Pages: | 7 |
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| Citation Phsyical Description: | 226-232 |
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| Citation Search Results Text: | Breeding biology of Acadian flycatchers in a bottomland hardwood forest; 1998; Article; Journal; Wilson Bulletin; Wilson, R.R.; Cooper, R.J. |
| Citation Start Page: | 226 |
| Citation Volume: | 110 |
| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Breeding biology of Acadian flycatchers in a bottomland hardwood forest; 1998; Article; Journal; Wilson Bulletin; Wilson, R.R.; Cooper, R.J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://elibrary.unm.edu/sora/Wilson/v110n02/p0244-p0261.pdf |
| Date Other: | Wed, 16 Jun 2010 12:18 -0500 |
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