|
- 积分
- 17983
- 威望
- 17983
- 包包
- 26159
|
( g; r/ b# f7 X* W
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
) C5 n, h. w8 p9 K9 P$ Q$ w L
; C7 i7 l# ] K) }/ b, L |
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
