Choujin Taikei

In a future where birds have become the dominant species, they rule over Earth with the help of bird-like aliens who enhanced their intelligence. Humans are now kept as livestock while the birds establish a structured society complete with laws, currency, nations, and social classes. Mirroring the systems they replaced, the birds soon divide into factions—predatory birds and those that eat insects and grains—leading to an ongoing conflict between them. Meanwhile, the aliens who aided the birds begin to evaluate which species should eventually take their place as Earth's new rulers in this science fiction thriller.