Kittywakes are seabirds in the gull family Laridae. There are two species:
Black-legged Kittiwake Rissa tridactyla
Red-legged Kittiwake Rissa brevirostris
The range of the Blacked-legged Kittiwake covers both coasts of the United States while the range of the Red-legged Kittiwake is south of the Aleutian chain.