Hello Peterson,
Welcome. I collect only Newfoundland stamps (a province of Canada that once was its own issuer of stamps).
I am unabashedly biased, but Newfoundland has some pretty wildlife stamps--including a whole set of caribous.
But also others like harp seals, fish, newfoundland dogs, and if you count British royalty as wildlife, then many of those.
here is an image of the Caribou series from 1919
