New video has emerged on Tuesday of the chaotic moments after Delta flight 4819 flipped over on the runway at Toronto Pearson International Airport.

This topsy-turvy behavior may result from the evolutionary journey bats took toward flight, said Tara Hohoff, a bat biologist and the coordinator of the Illinois Bat Conservation Program.

Adults weigh 7-10 g (0.3-0.4 oz); females are slightly heavier than males. Because of their small size and nocturnal habits, bats are nearly impossible to identify in flight. However, when roosting, ...