Snow GooseChen caerulescens
25-31" (64-79 cm). Smaller than the domestic goose. Pure white with black wing tips; bill pink with black "lips"; legs pink. Young birds have dark bill and are mottled with brownish gray above. A dark phase, once considered a separate species called the "Blue Goose," has bluish-gray upperparts, brownish underparts, and white head and neck. Blue-phase birds have spread westward in recent decades and are now found locally throughout their winter range among the thousands of white Snow Geese.