During the day, they may hide under logs, bark, stones, or leaves and prefer a humid environment. Amblypygids may range from 5 to 40 mm. Their bodies are broad and highly flattened. Their very thin modified legs can extend several times the length of body. They have no silk glands or poisonous fangs, but can have prominent pincer-like pedipalps.
Amblypygids often move about sideways on their 6 walking legs, with one "whip" pointed in the direction of travel while the other probes on either side of them. Prey are located with these "whips", captured with pedipalps, and then torn to pieces with chelicerae.