Question

One of the earliest known birds with a beak and contour feathers, confuciusornis sanctus, with large clawlike thumbs on its wings, which probably helped them to climb up to a launching position for flight.

Answer 1

sondenso wrote: 108. One of the earliest known birds with a beak and contour feathers, Confuciusornis sanctus, with large clawlike “thumbs” on its wings, which probably helped them to climb up to a launching position for flight.