Aristophanes 
The Birds [EPUB ebook] 

Two middle-aged men stumbling across a hillside wilderness are guided by a pet crow and a pet jackdaw. One of them advises the audience that they are fed up with life in Athens, where people do nothing all day but argue over laws, and they are looking for Tereus, a king who was once metamorphosed into the Hoopoe, for they believe he might help them find a better life somewhere else.