Mesozoic Birds : University of California Press : 9780520200944 : 0520200942 : 13 Dec 2002 : Mesozoic Birds: Above the Heads of Dinosaurs is the most authoritative and up-to-date source on early avian evolution currently available. This unique resource provides comprehensive examination of the known fossil record and is also an unparalleled guide to the fast-paced developments in current research. The origin of birds and their relationship to dinosaurs continue to be hotly debated among paleontologists, ornithologists, and evolutionary biologists. This cutting-edge reference will become an essential resource for those interested in this debate and in many other fascinating topics relating to the evolution of the earliest known birds.