Who said monster? (1970)

On a dark night in the woods, a chick runs away scared: something threatening chases him and he fears it's the monster the adults at the tree café are talking about. A journalist robin tries to find out more, but everyone says different things and the identikit that emerges is somewhat unlikely. Despite this, the adults march out of the café to take justice into their own hands, but when they arrive in the woods they come across something unexpected...