Published in GAMES Magazine, March/April 1981 issue, page 52, as an original game by R. Wayne Schmittberger, where "blades and beaks battle through time . . ." Players pit prehistoric pterodactyls against combat helicopters in a battle to eliminate all the opposing forces or their bases (jungles or airports, respectively).
From GAMES Magazine:
"How or why the rift in time opened up remains a mystery. One moment all was quiet. Next, the skies filled with the raucous "Caw! Caw!" of winged prehistoric reptiles, and then the smooth "Whirr! Whirr!" of gleaming helicopters in hot pursuit . . ."