Bird on a beach
I believe the answer is:
tern
'bird on a beach' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tern that I've seen before include "Fork-tailed relative of the gull" , "Seagull" , "Gull-like sea bird" , "Fork-tailed seabird" , "Small seabird with forked tail" .)