1, different subjects

Black water fowl: a bird of the order Craneiformes, family Rangiferidae.

Black buffalo duck: belongs to the family of birds in the order Craneiformes, Rangiferidae.

2, color varies

Black bufflehead: black, white and red color combination.

Black buffalo duck: the whole body is mainly black.

Black water fowl:

Black water duck:

3, different food habits

Black water fowl: feeding on water plants, small fish and shrimp, and aquatic insects.

Black water duck: a more varied diet, mosquitoes, beetles, small snails, small fish, small frogs, locusts, crickets and some aquatic plants can eat.

4, habitat varies

Black water fowl: perched in bushes, cattails and reeds, good diving.

Black Water Duck: prefers to roost in freshwater wetlands with water-supporting plants.

5. Distribution varies

Black waterthrush: breeds in western Xinjiang, eastern China, southern China, southwestern China, Hainan Island, Taiwan and southeastern Tibet in most parts of China.

Black buffalo duck: distributed in Eurasia and northern Africa.