 Arboreal tarantulas generally have better vision compared with terrestrial tarantulas.All types of tarantulas have two sets of book lungs (breathing organs); the first pair is located in a cavity inside the lower front part of the abdomen near where the abdomen connects to the cephalothorax, and the second pair is slightly farther back on the abdomen.Air enters the cavity through a tiny slit on each side of and near the front of the abdomen.