nice duck

Some types of ducks can also crossbreed, but produce a sterile offspring and can not have offspring. Such a cross between serati and runner duck can produce sterile offspring, brati and tiktok.

Duck or Duck is the common name for several bird species in the Anatidae family. Ducks are mostly aquatic birds that are mostly smaller in size than their relatives, geese and short-necked swans, and can be found in both fresh and marine waters.
Ducks are sometimes likened to some water birds that are distantly related but similar in appearance, such as loons, grebes, gallinules, and coots.

By @praxsteem