Rather than build webs, trapdoor spiders set underground traps for their prey. (See References 1) These spiders dig underground burrows and cover the entrances with "trapdoors" made of silk, leaves and dirt particles. When an unsuspecting prey passes by the door, the trapdoor spider quickly emerges from the burrow and drags its victim into its lair. This spider uses its sealed layer to protect itself and its eggs from weather and predators. Urban development may be a potential threat to it, according to the International Union for the Conservation of Nature. (See References 2)
Wolf spiders are large brown spiders with body hair and large, wolf-like fangs. Some wolf spiders develop small underground burrows for laying eggs and salvaging prey, according to the University of Kentucky Department of Entomology. (See References 3) Wolf spiders also use their burrows as forts from potential threats---humans and predators. These spiders are quick in chasing down prey. Female wolf spiders carry egg sacs on their backs. After they hatch, wolf spider offspring remain on their mothers' back until they are old enough to fend for themselves.
Tarantulas are large spiders---up to 11 inches in diameter, including legs---with hairy bodies and legs. Although they look fearsome and a tarantula bite is painful, tarantulas do not have a high level of venom. Nearly all tarantulas live underground to escape heat during the day and leave their burrows only at night. Tarantulas usually eat insects, but larger species prey on amphibians and small mammals. Tarantulas secrete ingestive enzymes that liquefy their prey. When the food is liquefied, the spider sucks it through the mouth, which is straw-like in form. (See References 4)
Most funnel-web spiders develop funnel-shaped webs above ground, but one species from the Land Down Under, the Sydney funnel-web spider, has an underground lair. This spider creates a funnel-shaped web above ground; however, the web serves has a silky entrance to the spider's burrow. The Sydney funnel-web spider is shiny black and measures up to two inches long. The spider emerges at night and commonly leaves its burrow during or after a rainstorm. It is dangerously venomous, according to Australia's Commonwealth Scientific and Industrial Research Organisation. (See References 5)