Tundra Bean Goose
tundrametsähanhi · Anser serrirostris

Photo: 邱文強, CC BY-SA 4.0
Family: Anatidae (Sorsat) · Size: 69–88 cm
The tundra bean goose is a goose that breeds in northern Siberia. This and the taiga bean goose are recognised as separate species by the American Ornithological Society and International Ornithologists' Union, but are considered a single species by other authorities. It is migratory and winters further south in Asia. The taiga and tundra bean goose diverged about 2.5 million years ago and established secondary contact ca. 60,000 years ago, resulting in extensive gene flow.
Where and when to see it
This is a sensitive species: FinBIF hides when and where most of its sightings were made, so no places are suggested.