The Birds is a comedy by the Ancient Greek playwright Aristophanes. It was performed in 414 BC at the City Dionysia in Athens where it won second place. It has been acclaimed by modern critics as a perfectly realized fantasy remarkable for its mimicry of birds and for the gaiety of its songs. Unlike the author's other early plays, it includes no direct mention of the Peloponnesian War and there are few references to Athenian politics, and yet it was staged not long after the commencement of the Sicilian Expedition, an ambitious military campaign that greatly increased Athenian commitment to the war effort. In spite of that, the play has many indirect references to Athenian political and social life. It is the longest of Aristophanes's surviving plays and yet it is a fairly conventional example of Old Comedy.

Aristophanes was an Ancient Greek comic playwright from Athens and a poet of Old Attic Comedy. He wrote in total forty plays, of which eleven survive virtually complete today. These provide the most valuable examples of a genre of comic drama known as Old Comedy and are used to define it, along with fragments from dozens of lost plays by Aristophanes and his contemporaries.