They fly in V formations (5)
I believe the answer is:
geese
(Other definitions for geese that I've seen before include "Birds that fly in a skein" , "Honking birds" , "Protectors of city" , "Skein or gaggle?" , "Water birds; fools" .)
I believe the answer is:
geese
(Other definitions for geese that I've seen before include "Birds that fly in a skein" , "Honking birds" , "Protectors of city" , "Skein or gaggle?" , "Water birds; fools" .)