The ancestor of all of today's birds survived the catastrophic asteroid strike that killed the dinosaurs because it was a quail-like creature that waddled on the ground.
All flying birds died after the asteroid hit our planet 66 million years ago (19659003) It is believed that the asteroid hit Earth at 40 times the speed of sound – an explosion seven billion times larger than the Hiroshima bomb.
Only birds on the ground were able to survive – and they evolved thousands of years later, according to University of Bath researchers.
The researchers analyzed the fossil record in the plants that survived after the asteroid eradicated dinosaurs.
Dr. Daniel Field, of the University of Bath, said, "We have followed different approaches to bring this story together."
"We came to the conclusion that after the impact of the asteroid the forests explain why tree birds could not survive this extinction.
" The ancestors of modern tree birds have not moved into the trees until the Have recovered forests from the endangered asteroid. "