Which animal expert guest-stars as himself in 'The Merv Griffin Show'?

Which animal expert guest-stars as himself in “The Merv Griffin Show”? Jim Fowler guest-stars as himself.

In the ninth-season episode, Kramer discovers discarded pieces of the original Merv Griffin Show set and turns his apartment into a homemade talk-show studio. He begins by interviewing people in a playful imitation of the real program, then changes the format into a more sensational tabloid-style broadcast.

Jim Fowler appears as an animal expert and arrives with a hawk. His appearance raises the stakes when George brings a squirrel to the set, hoping Fowler can take responsibility for the injured animal. The hawk’s presence turns the already chaotic fake talk show into a full disaster and helps destroy Kramer’s improvised set.

Fowler was a real American zoologist, wildlife educator, and television personality best known for Wild Kingdom. The other options are plausible because Steve Irwin, Jeff Corwin, and Jack Hanna were also recognizable television animal personalities, but none is the guest in this Seinfeld episode.