Family Canidae.

The family of carnivorous and omnivorous mammals commonly known as canines. It includes dogs, wolves, foxes, coyotes, dingoes and jackals. These animals are all digitigrades, meaning they walk on their toes.

source: Wikipedia

top row, left to right: coyote, wily coyote, arctic fox
bottom row, left to right: red fox, wolf, wolfie

More canids can be found in the Red Fox, Arctic Fox, Wolf, and Coyote Galleries.