- naughty naughty birdie -

Here's one for the creationists (in response to Lisa).

The Aquatic Warbler is the rarest songbird in Europe; it is also the most promiscuous.

The male birds are "continuously ready to mate and testing every female for her willingness to copulate." They have large balls, and have prolongated sex of up to half an hour to prevent other males from pushing in, and also allowing the female to gauge them better.

Here's the article that sums up the whole deal.