Abundance: 0.01 to 1.59% (median 0.29%)

Latitudinal range: 34.8° to 56.3°

Habitats: (7), boreal forest/taiga (1)

Found in 8 samples

Canada: Churchill Falls, Charlie Lake Cave (Zone IV) (Holocene), Keffer (Midden 57, screened) (Holocene), McNichol Creek (midden) (Holocene), Spillsbury Bay (Holocene)

Spain: Cueva de Nerja (Early Holocene) (Holocene)

United States: Scovill (Holocene), Schuiling Cave (Late Pleistocene)

See also Mergus merganser, Mergus serrator, Mergus sp.