List of Anseriformes by population

This is a list of Anseriformes species by global population. While numbers are estimates, they have been made by the experts in their fields.

The first bird in this list, the crested shelduck, retains a status of Critically Endangered on the IUCN Red List but may in fact be extinct. The last confirmed reporting was in 1964 near Vladivostok. North Korea claimed a sighting in March 1971, but this record is highly suspect. Unconfirmed reports do, however, periodically roll in from Northeast China, giving scientists hope that the last individual has not yet died. To be assessed as Critically Endangered a species must have experienced a decline of at least 80% in the past ten years or three generations, or be projected to decline that much in the future ten years or three generations. 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.

Extinct species:

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