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- 积分
- 17983
- 威望
- 17983
- 包包
- 26159
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0 K6 X- d) O- p+ G% vCOVER 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 Stringham9 H; }5 i1 D8 f3 Q4 I( g$ k" j6 l3 l
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发表于 2013-3-1 20:01
发表于 2013-3-4 14:25
