Do geese have penises?

If you've never seen a duck penis before, have a look at the infamous video above. That long corkscrew belongs to a Muscovy duck, and it's typical of the group. Some ducks have helical penises that are longer than their entire bodies. read more

Ganders most definitely have penises, large corkscrew like penises. Vent sexing is the term used to describe how one can sex geese by exposing their genitalia via the vent. read more

There are almost 10,000 species of birds and only around 3 percent of them have a penis. These include ducks, geese and swans, and large flightless birds like ostriches and emus. But eagles, flamingos, penguins and albatrosses have completely lost their penises. So have wrens, gulls, cranes, owls, pigeons, hummingbirds and woodpeckers. read more

Geese are one of the few birds that do have a penis. It is out of sight inside the cloaca under normal circumstances, only emerging when mating is about to occur. It is then inserted into the female's cloaca, delivering sperm inside her. The eggs are then fertilised, coated in shell and laid, as with other birds. read more

Penises have been lost several times in the evolution of birds. Cohn’s team have only compared two groups—the penis-less galliforms (chickens, quails and pheasants) and the penis-equipped anseriforms (swans, ducks and geese). read more