Greylag Goose
Anser anser
The greylag is the largest and bulkiest of the grey geese of the genus Anser, but is more lightly built and agile than its domestic relative. It has a rotund, bulky body, a thick and long neck, and a large head and bill. It has pink legs and feet, and an orange or pink bill with a white or brown nail (hard horny material at tip of upper mandible). It is 74 to 91 centimetres (29 to 36 in) long with a wing length of 41.2 to 48 centimetres (16+1⁄4 to 19 in). It has a tail 6.2 to 6.9 centimetres (2+7⁄16 to 2+11⁄16 in), a bill of 6.4 to 6.9 centimetres (2+1⁄2 to 2+11⁄16 in) long, and a tarsus of 7.
ID text from Wikipedia, CC BY-SA 4.0
Snow Goose
Anser caerulescens
The snow goose has two color plumage morphs, white (snow) or gray/blue (blue), thus the common description as "snows" and "blues". White-morph birds are white except for black wing tips, but blue-morph geese have bluish-gray plumage replacing the white except on the head, neck, and tail tip. The immature blue phase is drab or slate-gray with little to no white on the head, neck, or belly. Both snow and blue phases have rose-red feet and legs and pink bills with black tomia ("cutting edges"), giving them a black "grin patch". These colors distinguish the species from white domesticated geese.
ID text from Wikipedia, CC BY-SA 4.0
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