Longest bird penis

Measuring up to 43 cm long, which equals this species' combined head and body length, the longest bird penis is that of the Argentine lake duck Oxyura vittata. Corkscrew-shaped, it is brush-tipped, to brush out any sperm left inside the female from previous matings with other males, and it is also used by the male to lasso the female if she attempts to escape during copulation!