1978
Why Arbor Day? I dunno. It's Arbor Day, Charlie Brown was one of my favorite cartoons, maybe that was the inspiration.
Croboc was a character who served a function similar to that of "Grog" in B.C..... he was less anthropomorphic than the other dinosaurs, and of somewhat lesser intelligence, yet was treated by the other dinosaur-people as one of their own despite his animalistic nature.
