Michael Fundaro wrote:Does she quack? Or does he give a lame, raspy squeak?
↑ This!
↑ Unless the duck is a breed or cross where the color/markings are different for male vs female, the only way I've ever been able to tell is by the sound. Pick it up and if it makes a big "UTT!" sound, then it's a girl. If it doesn't make a big sound, it's probably a boy. Some ducks are harder to discern between than others, and it's easier if you have a few to compare the sounds of. But, if it makes a good "UTT!" sound, then you can be pretty sure it's a girl.
EDIT: Wait, is the duck a muscovy? I just noticed the duck in the background was a muscovy, and I know nothing about IDing them! They're very different from the mallards that I have.