The Jackdaw and the Doves

A JACKDAW, seeing some Doves in a cote abundantly provided with food,
painted himself white and joined them in order to share their plentiful
maintenance. The Doves, as long as he was silent, supposed him to be
one of themselves and admitted him to their cote. But when one day he
forgot himself and began to chatter, they discovered his true character
and drove him forth, pecking him with their beaks. Failing to obtain
food among the Doves, he returned to the Jackdaws. They too, not
recognizing him on account of his color, expelled him from living with
them. So desiring two ends, he obtained neither.