Scaup is the common name for three species of diving duck:
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Greater scaup
The greater scaup (''Aythya marila''), just scaup in Europe or, colloquially, "bluebill" in North America, is a mid-sized diving duck, larger than the closely related lesser scaup. It spends the summer months breeding in Alaska, northern Canada, ...
, or just "scaup", ''Aythya marila''
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Lesser scaup
The lesser scaup (''Aythya affinis'') is a small North American diving duck that migrates south as far as Central America in winter. It is colloquially known as the little bluebill or broadbill because of its distinctive blue bill. The origin of ...
, ''Aythya affinis''
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New Zealand scaup, ''Aythya novaeseelandiae''
External links
{{Animal common name
Birds by common name