|
- 积分
- 17983
- 威望
- 17983
- 包包
- 26159
|
: i$ n) }+ K3 b0 d/ Z
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 Stringham. \# \, N( u7 m( n6 ?5 z
5 [% Q; f! c8 Z0 ~$ n* `
|
附件: 你需要登录才可以下载或查看附件。没有帐号？注册
|
发表于 2013-3-1 20:01
发表于 2013-3-4 14:25
