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Chickadees sneak up the social ladder

DNA tests of paternity in chickadees show the benefits of surreptitious partnering.

Otter, K., et al. 1998. Do female black-capped chickadees prefer high-ranking males as extra-pair partners? Behavioral Ecology and Sociobiology Online 43(June 24):25. (http://link.springer.de/link/service/journals)

Sources:

Ken Otter
University of Copenhagen
Zoological Institute
Tagensvej 16
DK-2200 Copenhagen N
Denmark

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