Yellow Sac Spiders in NJ, NYC & Eastern PA

image of a yellow sac spider

Yellow Sac Spider Control in New Jersey, New York City, Philadelphia, Connecticut, and Delaware


  • Across the U.S., yellow sac spiders are among the most likely spider species to invade homes.
  • These pests are nocturnal hunters that move quickly across surfaces. When not hunting prey, these spiders retreat into silken tunnels that they create as harborage.
  • Homeowners will rarely see them outdoors.


What Do Yellow Sac Spiders Look Like?

Size: Roughly the size of a dime to a nickel, or about one-quarter to one-half inch long
Color: Pale large abdomen that is tan or yellow to beige with a cephalothorax that is often darker in color
Characteristics: Eight small eyes grouped in rows of two and a long, oval abdomen


What Do Yellow Sac Spiders Eat?

These predators feed on small insects and their eggs. Yellow sac spiders supplement their diet with nectar to maintain optimal energy.


The pests lay eggs two weeks after mating, which they then guard for a few weeks. Even though the females only mate once, they can produce as many as five egg sacs with about 40 eggs each. Immature yellow sac spiders stay inside this sac as they develop.


  • Look for yellow sac spider retreats, such as silken tubes, in corners of walls and ceilings.
  • Spot the spiders crawling on ceilings and walls during evening hours.
  • Notice unexplained bites on skin.

Problems Caused by Yellow Sac Spiders

Yellow sac spiders account for most indoor spider bites. People often come into conflict with these spiders when the pests are trapped in bedding and clothing. Their bites can be barely noticeable or quite painful. Normal symptoms include itching and redness, though some bites can be more serious including lesions.

Signs of Infestations

In addition to spotting spiders crawling along baseboards, homeowners may also see egg sacs attached to walls near corners.

Prevention Tips

Residents can reduce yellow sac spider populations by practicing good sanitation. Remove food spills, insects, and indoor webs with regular cleaning. Also, clear clutter indoors and around the outside perimeter of the house to reduce shelter sites.

Tips for Removal from Home

This species reproduces quickly indoors, so removing the pests from homes often requires a long-term plan. Contact local pest control companies for effective yellow sac spider removal.