The elephant bird was the heaviest bird to ever walk the earth. Also, its eggs were 150 times the size of a chicken egg and thick as a dinner plate.
Elephant birds lived in Madagascar. They seem to have been mostly herbivorous. None of them flew. There were a number of different species that ranged from the size of an ostrich to the size of a smart car.
Hansford: The biggest I measured for any of the elephant birds was somewhere around 1,900 pounds.