Synonyms to bats

cuckoo, Philomel, ape, balmy, bananas, barmy, batty, beany, bonkers, buggy, bughouse, bugs, bulbul, cackle, call, canary, carol, caw, chatter, cheep, chirk, chirp, chirr, chirrup, chitter, chuck, clack, cluck, cock-a-doodle-doo, conformist, coo, copier, copycat, copyist, counterfeiter, crackbrain, crackbrained, cracked, crackers, crank, cranky, crazed, crazy, croak, cronk, crow, daffy, daft, ding-a-ling, dippy, dissembler, dissimulator, dotty, drum, echo, echoer, echoist, faker, feathered songster, flaky, flipped, forger, freaked-out, fruitcakey, fruity, gabble, gaga, gaggle, gobble, goofy, guggle, harebrain, haywire, honk, hoo, hoot, hypocrite, imitator, impersonator, impostor, just plain nuts, kook, kooky, lark, loony, loopy, lunatic, mavis, mime, mimer, mimic, mimicker, mocker, mockingbird, monkey, nightingale, nut, nuts, nutty, off the hinges, off the track, off the wall, oriole, parrot, peep, phony, pip, pipe, plagiarist, poll-parrot, polly, polly-parrot, poseur, potty, quack, ringdove, roll, round the bend, scold, screwball, screwballs, screwy, sheep, simulator, sing, singing bird, slaphappy, song sparrow, songbird, songster