a (real or imitation) bird used to attract others so that they can be caught
bait, trap
a kind of wild animal like a dog
person who allows himself to be used
an animal like, but larger than, a mouse; a person who deserts a cause that he or she thinks is about to fail
informer
to steal (something of little or no value); to report (about a person) to an official
informer
a person who gives advice about who will win races
informer
a person who betrays a friend, is disloyal to his country etc
person who is disloyal
a person who leaves one group and joins another
traitor
a kind of small, fierce animal with red-brown fur
sneak