Kermit and Fozzie's Dad

From Muppet Wiki

Kermit and Fozzie's Dad is the father of both Kermit the Frog and Fozzie Bear in The Great Muppet Caper. An old friend of Mike Tarkanian, he is only glimpsed in a photograph (with the implication that he is now deceased). Dad resembles Fozzie, but with green fur and Kermit's eyes and collar, and is apparently some unusual amalgam of bear and frog.