Recent Study Uncovers The Mystery of The Ostrich Penis

Most species of bird copulate by touching together their cloaca, openings that facilitate both mating and excretion. Ducks, geese, swans, flamingos, ostriches, kiwis and emus are different; they all have penises that swell to erection. For most of them, the erection is produced by lymph fluid, but the ostrich has long been believed to have […]