These spiders are named for their reproductive habits. Mother spiders carry their egg sacs using their mouth parts and then attach the sac to a plant and build a nursery web around them to protect the emerging spider-lings. Common nursery web spiders in Massachusetts and other parts of New England include the dark fishing spider (Dolomedes tenebrosus), nursery web spider (Pisaurina mira) and six-spotted fishing spider (Dolomedes triton).
By: Sciencing