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The Smithsonian Migratory Bird Center is dedicated to fostering greater understanding, appreciation, and protection of the grand phenomenon of bird migration. [Information of the supplier]
nationalzoo.si.edu/scbi/migratorybirds/
Birds in Backyards is a research, education and conservation program focusing on the birds that live where people live. Get involved by becoming a member and taking part in our online surveys. Learn about how you can create bird-friendly spaces in your garden and local community. Find out more about ... [Information of the supplier]
www.birdsinbackyards.net/
American Bird Conservancy (ABC) is a not-for profit organization whose mission is to conserve native birds and their habitats throughout America. We envision an America-wide landscape where diverse interests collaborate to ensure that native bird species and their habitats are protected, where their ... [Information of the supplier, modified]
www.abcbirds.org/
The Macaulay Library is the world's largest archive of animal sounds.We have more than 160,000 recordings of 67 percent of the world's birds, and rapidly increasing holdings of insects, fish, frogs, and mammals. The Macaulay Library is a principal source of sound recordings for basic research, education, ... [Information of the supplier]
macaulaylibrary.org
Das Buch „Migration of birds“, das zum ersten Mal 1935 erschienen ist, wird auf dieser Webseite in der überarbeiteten Version von 1998 als Online-Buch zugänglich gemacht. Thema ist der Vogelzug mit Schwerpunkt Nordamerika, u.a. werden auch Informationen zu Kurzstreckenziehern, Langstreckenziehern, ... [Redaktion vifabio]
www.npwrc.usgs.gov/resource/birds/migratio/index.htm
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