Migratory bird (6)
I believe the answer is:
cuckoo
(Other definitions for cuckoo that I've seen before include "Bird (with a bad reputation)" , "building no nest?" , "flier?" , "counting as bird? Yes and no" , "Bats" .)
I believe the answer is:
cuckoo
(Other definitions for cuckoo that I've seen before include "Bird (with a bad reputation)" , "building no nest?" , "flier?" , "counting as bird? Yes and no" , "Bats" .)