Ctenizidae, commonly known as trapdoor spiders, are a family of spiders characterized by their burrowing behavior. They create silk-lined burrows with a camouflaged lid, which they use to ambush prey. These spiders are primarily found in warm, temperate regions and are known for their robust bodies and strong fangs. Trapdoor spiders are nocturnal hunters, emerging from their burrows at night to catch insects and other small animals. They belong to the order Araneae and are closely related to other spider families. Their unique hunting strategy and burrowing habits make them fascinating subjects of study in arachnology.