rivercrow
shoshaku jushaku
- Joined
- Apr 19, 2007
- Messages
- 1,555
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Some of you know about bird sex. Some of you don't.
Most male birds don't have external genitalia. Waterfowl seems to be the exception. Why?
Duck penises show "arms race" between sexes
For some reason, I've been discussing bird sex with several people lately. I guess it stands to reason that there would be an article about it.
Most male birds don't have external genitalia. Waterfowl seems to be the exception. Why?
Duck penises show "arms race" between sexes
For some reason, I've been discussing bird sex with several people lately. I guess it stands to reason that there would be an article about it.