Most birds do not have penises. Only a few do, like ostriches and ducks and geese. "And they don't have penises exactly like mammals," McGowan said.
In mammals, both sperm and urine travel through ducts inside the phallus.
That's not the case for the few bird species that have penises.
"It does get erect during copulation, but the sperm travels along its surface to reach the cloaca of the female."