Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
Agricultural Impact Of A Winter Population Of Blackbirds And Starlings, Richard A. Dolbeer, Paul P. Woronecki, Allen R. Stickley Jr., Stephen B. White
Agricultural Impact Of A Winter Population Of Blackbirds And Starlings, Richard A. Dolbeer, Paul P. Woronecki, Allen R. Stickley Jr., Stephen B. White
USDA Wildlife Services: Staff Publications
The major concentration of blackbirds and Starlings (Sturnus vulgaris) in North America occurs in the southeastern United States where an estimated 350 million Red-winged Blackbirds (Agelaius phoeniceus) , Common Grackles (Quiscalus quiscula) , Brown-headed Cowbirds (Molothrus ater) , and Starlings congregate in winter roosts (Meanley 1971, 1975, 1977). An estimated 75-100 major (containing >l million birds) roosts form in the southeastern states each year. Increasing attention is being given to many of these roosts because of nuisance problems, reputed health hazards, and agricultural damage associated with them. Although considerable effort has been directed toward developing methods for reducing roosting populations …
Movement And Migration Patterns Of Red-Winged Blackbirds: A Continental Overview, Richard A. Dolbeer
Movement And Migration Patterns Of Red-Winged Blackbirds: A Continental Overview, Richard A. Dolbeer
USDA Wildlife Services: Staff Publications
From 1924 through 1974, about 11,000 recoveries accumulated from the banding of over 700,000 Red-winged Blackbirds(Agelaius phoeniceus) in North America. A few studies have examined some of these data for specific localities during certain times of the year; however, no attempt has been made to examine the total recovery data to compile a general picture of continental movement and migration patterns. Increasing attention is being given to blackbird (Icteridae) and Starling (Sturnus vulgaris) populations in North America because of their reported crop depredations, health hazards, and nuisance aspects, especially when congregating in large roosts (Meanley,1975;Graham, 1976). Solutions to these problems …