Sure, as a connoisseur of adult film, you've seen a lot of penises: but how well do you know penises from other parts of the animal kingdom? In partnership with the Sundance Channel, we're giving you a chance to show ofr your P.Q.—and win a prize, too.

The picture to the left shows Isabella Rossellini (of "Green Porno" fame) amongst a variety of animal penii. Can you identify the highlighted one? Leave your guess in the comments—and if you pick right, you'll get the chance to win a prize from Sundance.

So what are you waiting for? Get guessing! (And if you need a little help... this gallery should give you some clues.)

· Name That Schlong (sundancechannel.com)

Send an email to Lux Alptraum, the author of this post, at lux@fleshbot.com.