Gray Geese (Anser) — identification, habitat & look-alikes

Gray Geese are a group of sturdy that includes brown, gray, and nearly white species. In the United States, Snow and Ross's Geese can gather in large winter flocks, while Greater White-fronted Geese are especially familiar in the West. Bill shape, leg color, and head or belly markings help tell the species apart.

In this group

Greater White-fronted GooseAnser albifrons

Look mainly west of the Mississippi during migration and winter; adults show white around the bill and black blotches on the belly.

Snow GooseAnser caerulescens

This Arctic breeder winters widely in the Lower 48 and northern Mexico; white birds show black wingtips clearly in flight.

Ross's GooseAnser rossii

In winter it is especially reliable in California, New Mexico, Texas, and Louisiana; it is smaller and shorter-billed than a Snow Goose.

Emperor GooseAnser canagicus

This compact goose is centered on the Pacific coast of Alaska and nearby regions; adults have a white head and a dark, scaled-looking body.

Graylag GooseAnser anser

Wild birds are very rare in the U.S., but domestic forms descended from Graylags are familiar in parks and on farms; look for a large goose with an orange bill.

Appearance

Appearance: The ranges from brown-gray geese to white species with black wingtips. All have white feathers above and below the tail, but that mark is not always easy to see in a photo.
How to recognize it: These are sturdy, heavy-bodied geese. Their legs are pink or orange, and their bills may be pink, orange, black, or patterned; use bill shape, head markings, belly pattern, and size together.

Look-alikes

Black GeeseBranta

Black Geese have black legs and usually darker body plumage. Gray Geese have pink or orange legs, but always confirm the head, neck, and bill pattern for the species.

Why they get mixed upBoth groups include flocking geese that use wetlands and fields.

Where it lives

Typical habitats: marshes and ponds
coastal wetlands
farm fields
Range: Native members breed across northern North America and Eurasia. In the U.S., Emperor Geese are centered on Alaska, while Snow, Ross's, and Greater White-fronted Geese travel into the Lower 48 for migration or winter.
Seasonal presence: Most wild North American members are , although their routes and winter ranges differ widely.
Preferred conditions: Many species rest on open water and feed in marshes or farm fields. The best habitat and season vary by species and migration route.
Migration: Most species move south from northern breeding areas for winter. Some form very large flocks that move between wetlands and fields.

Behavior

Diet: Diet varies across the genus. In the U.S., Greater White-fronted Geese eat crops and grasses, while Emperor Geese also eat marine animals such as mussels and barnacles.

Life cycle

Reproduction: Most species breed in open, wet country in the cooler parts of the Northern Hemisphere. Breeding places and timing differ by species.

Name and classification

About the name: Emperor, Snow, and Ross's Geese were once placed in the genus Chen.
Group name: Gray Geese is a name for the whole genus Anser. In everyday birding, “gray geese” may mean only the brown and gray members; “geese” also includes other genera such as Black Geese (Branta).
Number of species: Anser includes 11 living species worldwide.

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