lotsa critters here!
According to the "Friends of Smith Bybee" website there are beaver, deer, turtles, heron....oh heck, take a look at the list yourself. Anyway, so far I've seen a few Heron and one Beaver (or at least a furry lump on a log that looked like a beaver). There are guided nature hikes in the park and I'm gonna check one out pretty soon.