From A Different World - Forums

*insert duckface here*

The ducks in picture number are one are mallards, the male is the one with the green head is the male and the brown one is the female. It's hard the figure out which Canadian goose in the second picture is the male and which is the female. They both look the same so you have to listen to their call and look at their behavior. There is another way to tell, but I'll let you look it up yourself.