Grayback or Greyback may refer to:
*
Grayback (fish)
*
Dowitcher, a wading bird
*An American duck, ''
Aythya americana
The redhead (''Aythya americana'') is a medium-sized diving duck. The scientific name is derived from Greek ''aithuia'', an unidentified seabird mentioned by authors including Hesychius and Aristotle, and Latin ''americana'', of America. The red ...
''
*A character in the ''
Battle Realms: Winter of the Wolf'' video game expansion pack
*
Greyback, an American Civil War Confederate currency
*
USS ''Grayback'', either of two US Navy submarines
{{Disambiguation
Animal common name disambiguation pages