Contact: Steve Koppes
University of Chicago
Caption: Longipteryx, an early bird, lived during the early Cretaceous period approximately 120 million years ago. Research at the University of Chicago and the Field Museum shows that the birds during the Cretaceous displayed far less diversity than the astounding variety that exists today.
Credit: Allison Elaine Johnson
Usage Restrictions: News organizations may use this image in connection with reports about the research of Jonanthan Mitchell and Peter Makovicky.
Related news release: Prehistoric birds lacked in diversity