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Science 22 December 1978:
Vol. 202. no. 4374, pp. 1298 - 1300
DOI: 10.1126/science.202.4374.1298
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Articles

Social Plasticity in the Acorn Woodpecker

PETER B. STACEY 1 and CARL E. BOCK 1

1 Department of Environmental, Population and Organismic Biology, University of Colorado, Boulder 80309

Acorn woodpeckers (Melanerpes formicivorus) in southeastern Arizona exhibited two different types of social organization: one of highly cooperative and resident groups and another of birds that migrated and formed only temporary male-female pairs during reproduction. The occurrence of both patterns in the same population indicates a high degree of social flexibility in this species.

Submitted on April 25, 1978


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Science. ISSN 0036-8075 (print), 1095-9203 (online)