Common Mergansers only live in fresh—water, like the Guadalupe River. Females have brick—red—colored heads, males have emerald—green colored heads, and both sexes have slender, red—orange bills and a white body with grey or black plumage on the back.
Fun Fact The Common Merganser dives up to 30 feet underwater to capture small fish. It also eats shrimp, salamanders, and freshwater mussels.