The family Nesticidae, belonging to the order Araneae (spiders), is commonly known as cave spiders or scaffold web spiders. These small to medium-sized spiders are often found in dark, sheltered habitats such as caves, leaf litter, or under rocks, and some species live in human-made structures. Nesticids typically build irregular, tangle-like webs and are primarily nocturnal hunters, preying on small insects and other arthropods. They are closely related to the Theridiidae (cobweb spiders) and share similar web-building behaviors, but Nesticidae are generally more specialized for low-light environments. Their adaptations to sheltered habitats, such as reduced pigmentation and delicate bodies in cave-dwelling species, reflect their unique ecological niche.