List of Anseriformes by population

Anseriformes (Anser being Latin for "goose") is the taxonomic order to which the ducks, geese, swans, and screamers belong.

For example, in North America, national and sub-national agencies use planes and helicopters to make aerial transects of breeding populations, and extrapolate these counts over the species' known ranges.

Forecasts can be made by studying habitat condition trends and by interviewing local experts.

Unconfirmed reports do, however, periodically roll in from Northeast China, giving scientists hope that the last individual has not yet died.

[3] As some species below are rapidly approaching their minimum viable population (MVP), the future may see their removal from the list and addition to the preceding paragraph.