u/Cyrodactyl

With a wingspan of 40-60 ft and weight of 500 pounds, these were the largest flying creatures to ever live. Despite being huge, like all modern brids, they are incredibly lightweight and couldn't carry most prey away. Though unlike modern birds, they instead were cold blooded. Because of this, they hardly flew and only ate fish to conserve energy. Who would've known the largest prehistoric bird would be awful at the job it was built for