Do birds have penises?

Let's look at the equipment. Most birds do not have a penis. Most birds have a little lump called a cloaca. ... Both sexes have the cloaca, so for most birds sex literally is about bumping uglies. read more

Most birds do not have a penis. Most birds have a little lump called a cloaca. During the breeding season when hormones are flowing the cloaca swells and birds can get a cloacal protuberance. read more

Most male birds (e.g., roosters and turkeys) have a cloaca (also present on the female), but not a penis. Among bird species with a penis are paleognathes (tinamous and ratites) and Anatidae (ducks, geese and swans). read more

The reason for the complex structures of the remaining 3 percent of avian species that do have penises is thought (papers published in 2007) to lie in the over-sexed activity of aquatic avian males during breeding season: females have evolved anatomical counters to 'raping' males to preserve female ability to select their mates. read more