Visit Oklahoma’s only rainforest with animals at the Tulsa Zoo! The Tulsa Zoo’s Rainforest exhibit turns 25 next year so find out why this particular exhibit just keeps getting better. One has to look closely to see some of the species who call the rainforest home. You can easily find 50 to 100 species in the facility; fish, frogs, mammals, and birds all housed inside the 14,000 square foot building where the temperature is kept around 80 degrees with 65 to 80 percent humidity! Many of the animals roam free which makes the experience even more exciting.