| Abstract: | We studied the postfledging dispersal movements and habitat use of juvenile Snowy Egrets (Egretta thula) (SNEG) and Black-crowned Night-Herons (Nycticorax nycticorax) (BCNH) in coastal Virginia using a dye (picric acid) and radiotelemetry. Results from monitoring radiomarked birds revealed significant differences both years between species, with SNEGs dispersing more widely than BCNHs. BCNH juveniles usually remained south of Delaware, but SNEGs often moved into Delaware and southern New Jersey. The maximum dispersal distance found for a SNEG was ca 340 km north of the natal colony. Temporal patterns of movement followed logistic relationships, with rapid initial movements, but relatively few movements after about 23 weeks for most birds. Cumulative distances moved by juvenile SNEGs during AugustSeptember differed from 1992 to 1993. No such year difference was found for BCNHs. Compared to SNEGs, BCNHs used man-made impoundments relatively more often than natural wetlands; however no quantitative assessment of habitat preferences could be made. |
| Genre: | Article |
| ProdID: | 5223097 |
| Citation Author: | Erwin, R.M.; Haig, J.G.; Stotts, D.B.; Hatfield, J.S. |
| Citation Contributing Office: | Patuxent Wildlife Research Center |
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| Citation End Page: | 356 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Wilson Bulletin |
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| Citation Number Of Pages: | 15 |
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| Citation Phsyical Description: | 342-356 |
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| Citation Public Comments: | 4916_Erwin.pdf |
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| Citation Search Results Text: | Dispersal and habitat use by post-fledging juvenile snowy egrets and black-crowned night-herons; 1996; Article; Journal; Wilson Bulletin; Erwin, R.M.; Haig, J.G.; Stotts, D.B.; Hatfield, J.S. |
| Citation Start Page: | 342 |
| Citation Volume: | 108 |
| Citation Year: | 1996 |
| Type: | citation/reference |
| Text: | Dispersal and habitat use by post-fledging juvenile snowy egrets and black-crowned night-herons; 1996; Article; Journal; Wilson Bulletin; Erwin, R.M.; Haig, J.G.; Stotts, D.B.; Hatfield, J.S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DOCUMENT): | http://elibrary.unm.edu/sora/Wilson/v108n02/p0342-p0356.pdf |
| Date Other: | Wed, 16 Jun 2010 12:17 -0500 |
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