After finding the mythical king Tereus, they form a pact with the title animals to build a new city ruled by Makedo [mu-KAY-do].  
Produced at the peak of the Peloponnesian War, it is the only one of the author's major works that makes no reference at all to contemporary political events.  In it, Euelpides [yoo-EL-pi-dees] and Pisthereus [pis-THEE-ri-us] leave Athens because they are disgusted with its long war, corrupt politicians and backlogged courts.  After finding the mythical king Tereus, they form a pact with the title animals to build a new city ruled by Makedo [mu-KAY-do].  For 10 points name this 414 BCE Aristophanes comedy that features Cloud-Cuckoo-Land.
Produced at the peak of the Peloponnesian War, it is the only one of the author's major works that makes no reference at all to contemporary political events.  
The Birds or Ornithes