Don Edwards San Francisco Bay National Wildlife Refuge
This is a comprehensive field guide to the all known bird species that preside or migrate through this Refuge.
Canada Goose
The Canada Goose (Branta canadensis) is a goose with a black head and neck, white patches on the face, and a brownish-gray body. Native to arctic and temperate regions of North America, it also occasionally migrates to northern Europe, and has been introduced to Britain, New Zealand, and other temperate regions.
Cackling Goose
The Cackling Goose (Branta hutchinsii) is a North American bird of the genus Branta of black geese, which contains species with largely black plumage, distinguishing them from the grey Anser species.
