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- 积分
- 17983
- 威望
- 17983
- 包包
- 26159
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COVER The rock pigeon (Columba livia) exhibits spectacular variation among more than 350 different domestic breeds. The adult male Old Dutch capuchine shown here is one of many breeds with a crest of reversed feathers on its head and neck. See page 1063 for a description of the genetic origins of the head crest and the relationships among breeds. For the story behind the cover, go to http://scim.ag/cov6123. Photo: Sydney Stringham3 q, p" F! d9 W$ R+ x6 {, `
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发表于 2013-3-1 20:01
发表于 2013-3-4 14:25
