Urban Ecology pp 315-320 | Cite as

House Sparrows Rapid Evolution of Races in North America

  • Richard F. Johnston
  • Robert K. Selander

Abstract

Conspicuous adaptive differentiation in color and size has occurred in the house sparrow (Passer domesticus) in North America and the Hawaiian Islands since its introduction in the middle of the 19th century. Patterns of geographic variation in North America parallel those shown by native polytypic species, in conformity with Gloger’s and Bergmann’s ecogeographic rules. Racial differentiation of house sparrow populations may require no more than 50 years.

Keywords

House Sparrow rapid evolution body size coloration geographic variation morphology 

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Richard F. Johnston
    • 1
  • Robert K. Selander
  1. 1.Museum of Natural HistoryUniversity of KansasLawrenceUSA

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