Daddy-long-legs spider (Pholcus phalangioides), also known as the cellar spider. This spider preys on other spiders, injecting them with venom from its fangs. Although native to the tropics it is now a common sight in houses worldwide. The daddy-long-legs spider is so called because its legs are around 5 to 6 times the length of its body. This spider should not be confused with the harvestman, a relative of the spiders in the order Opiliones, or the crane fly (family Tipulidae), which are also known as daddy-long-legs.