How Birds Have Sex. ... Some bird species, most notably several species of swans, geese and ducks, do not have cloacas, but instead male birds have an actual phallus (penis) that is inserted into the female during mating. read more
Because most birds do not have penises, the sex act and consequent conception are slightly different than in a mammal. They release sperm from the cloaca, a small posterior opening. read more