Giant birds with 20-foot wingspans once ruled North American skies – and may hold the secret behind Native American Thunderbird legends

Massive birds roamed North America alongside mammoths and early humans, showcasing their impressive size and ecological roles. Their extinction has provided fossil evidence that informs our understanding of prehistoric landscapes. These birds may have influenced Native American cultures through the legendary Thunderbird stories. While the direct connection remains unproven, their presence raises intriguing questions about human-animal interactions.