Definition
'Genus Branta' refers to a specific grouping of geese within the broader family Anatidae (ducks, geese, and swans). This genus includes species like the Canada goose, the brant, and the barnacle goose. These geese generally have darker plumage than geese in the *Anser* genus, often with black necks and heads. They inhabit regions across North America, Europe, and Asia. Think of 'Genus Branta' as a distinct branch on the goose family tree, characterized by certain shared traits.