*)As most readers with interest for the subject are supposed to be familiar with relevant evidences, this essay deliberately is not garnished with numerous references.
  Only for the proposal of the pro-avian lineage should be refered the author's small book, Palm, Svend, (1997) The Origin of Flapping Flight in Birds. Ballerup. (ISBN 87 - 986364 - 0 - 5). As for the question of dinosaurs warm-bloodedness is refered to Palm, Svend, (1997) The Warm-blooded Dinosaurs? Ballerup. (ISBN 87 - 986710 - 0 - 6). Each can be required by E-mail: palm@post7,