There were half-ton "chickens" in Australia 5 million years ago. 10 feet tall! https://en.wikipedia.org/wiki/Dromornis_stirtoni https://en.wikipedia.org/wiki/D

There were half-ton "chickens" in Australia 5 million years ago. 10 feet tall! https://en.wikipedia.org/wiki/Dromornis_stirtoni https://en.wikipedia.org/wiki/Dromornis_stirtoni Or the even heavier Elephant birds in Madagascar until 800 years ago. https://en.wikipedia.org/wiki/Elephant_bird https://en.wikipedia.org/wiki/Elephant_bird