Although there are some long-legged spiders, it’s easy to tell the Opiliones from the true spiders. Instead of having 2 separate parts to their body, Opiliones’ bodies appear to be one unit. They also have 1 obvious pair of eyes.
Contrary to some myths I’ve heard, Daddy long-legs have no venom and are not poisonous. They can emit a pungent fluid from their glands that would not taste good to predators. These spiders are sometimes confused with Cellar spiders, but Harvestmen also do not use silk.