Some animals of the Arctic tundra include: Mammals - Arctic foxes , Arctic hares , caribou , ermine , lemmings , musk oxen, polar bears , porcupines, Arctic shrews, squirrels, voles, weasels, wolves Birds - Arctic loons, snowy owls , falcons, ptarmigans, ravens, snow buntings, snow birds, snow geese , sandpipers, Arctic terns , tundra swans, many species of gulls Fish - cod, flatfish, salmon, trout Insects - Arctic bumblebees, blackflies, flies, grasshoppers , mosquitoes, and moths.