Spiders and Why You Want Them Around

Browse available resources.
You have questions. We have answers!
Contact UD Extension staff.
Read our latest accomplishments!
Find out how YOU can get involved!
Hands-on experiential learning for UD undergrads!
Submit a sample today.
Analyses to help manage your land.
Chat with a DE Master Gardener.
Protect your flock.
Find exciting job opportunities!

Spiders and Why You Want Them Around

Updated March 2025 | Written by: Grace Ferry and Brian Kunkel

House Spider

Common Name: American House Spider

Scientific Name: Parasteatoda tepidariorum

 

They Eat Pests in Your Home 

  • Mosquitoes that can carry viruses like West Nile and Zika virus

  • Flies that can spread E. coli and Salmonella

  • Termites, spiders or other arthropodsYellow Garden Spider

 

    A house spider
    House Spider

    Yellow Garden Spider

    Common Name: Yellow Garden Spider

    Scientific Name: Argiope aurantia

     

    They Eat Pests in Your Garden

    • Aphids and white flies that vector disease 

    • Caterpillars and beetles that feed on plants

     

      A Yellow Garden Spider
      A Yellow Garden Spider

      Grass Spider

      Common Name: Grass Spider

      Scientific Name: Agelenopsis

       

      Characteristics:

      • Cave-like web

      • Fast speed

      • Yellowish-brown color.

       

        A Grass Spider
        A Grass Spider

        Orb Weaver

        Common Name: Orb Weaver

        Scientific Name: Araneidae

         

        Characteristics:

        • The females are larger than males

        • Feed on a variety of insects.

         

          Orb Weaver
          Orb Weaver

          Wolf Spider

          Common Name: Wolf Spider

          Scientific Name: Lycosidae

           

          Characteristics:

          • They are solitary spiders

          • They do not spin webs

          • They carry egg sacs or spiderlings on their back

           

            Wolf Spider
            Wolf Spider

            UD Cooperative Extension

            This institution is an equal opportunity provider.

            In accordance with Federal law and U.S. Department of Agriculture policy, Cooperative Extension is prohibited from discriminating on the basis of race, color, national origin, sex, age, or disability.