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References

Preuss, N.O. 2001. Hans Christian Cornelius Mortensen: aspects of his life and of the history of bird ringing . Ardea 89(special issue) : 1-6 .
http://ardea.nou.nu/ardea_show_articl…

First banded bird recovery in Africa:
http://jncc.defra.gov.uk/PDF/pub07_wa…

Discoveries with satellite telemetry:
–bar-tailed Godwits fly non-stop over the Pacific, from Alaska to New Zealand, a 7000 mile journey at an average speed of over 35 miles per hour, in about 8 days
[http://www.nature.com/scitable/knowle…]

Eagle migration tracking:
http://www.raptors-international.org/…

Arctic tern, longest migration:
http://news.nationalgeographic.com/ne…
http://www.pnas.org/content/107/5/207…

Ancient Migration theory:
http://www.uh.edu/engines/epi2228.htm
http://www.npwrc.usgs.gov/resource/bi…

Bar-tailed godwits:
http://www.nature.com/scitable/knowle…

Bird Migration: A General Survey By Peter Berthold
http://books.google.com/books?hl=en&l…

Bald Eagle tracking: http://www.raptors-international.org/…
citation to original paper: http://pubs.er.usgs.gov/publication/5…