Ctenidae

Ctenidae is a family of spiders commonly known as wandering spiders. They are found in tropical and subtropical regions around the world, with a significant presence in the Americas. These spiders are characterized by their relatively large size, speed, and hunting behavior. Unlike many other spiders, they do not build webs to catch prey. Instead, they actively hunt their food, relying on their excellent eyesight and rapid movement.

Ctenids are typically nocturnal hunters, often seen on the ground or in low vegetation. Their diet consists mainly of insects, but larger species may also prey on small vertebrates. They possess venom, which they use to immobilize their prey, but most species are not considered medically significant to humans. However, some species, particularly those in the genus Phoneutria, are known for their potent venom and aggressive defense, leading to significant medical concern in areas where they are common.

The morphology of Ctenidae spiders varies, but they generally have eight eyes arranged in two rows, which contributes to their keen vision. Their legs are long and spiny, aiding in their swift locomotion. The family includes a diverse range of species, with many yet to be fully described. Due to their active hunting and sometimes defensive nature, encounters with Ctenidae can be notable, though serious envenomations are relatively rare and primarily associated with a few specific species.