Earthling - Variation on the Ooozlum Bird!

In the next cage we have the Whirly Twirly bird . a most innoffensive creature , who's sole defence when pursued by one of its many predators is to fly round and round in ever decreasing circles til it vanishes with a pop and a puff of blue smoke up its own rectal orifice from which safe abode it hurls abuse and excretia at its pursuer