call is a harsh, growling "karr", usually given in flight. Males are mostly silent but will whistle during courtship, based on a simple "wit-oo".

The only ducks that are similar are the greater scaup and lesser scaup, but these species lack the tuft and emit a different call.

The tufted duck is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.

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