Spiders in Illinois

Spiders found in Illinois include 12 unique species from 29 confirmed sightings based on contributions made by Spider ID members. It is important to remember that spiders seen in Illinois are not bound by the territorial lines decided on by humans, therefore their distribution is subject to change. Occasionally, spiders can be found well outside of their known range due to being intentionally or accidentally transported by humans in cars, luggage, and other belongings.


12 Species Found in Illinois

Illinois Sightings
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29 spider sightings have been made in Illinois by contributing members. Consider submitting confirmed sightings of your own.

Picture of Thomisidae (Crab Spiders) - Dorsal Enlarge Picture
Picture of Steatoda borealis - Male - Dorsal Enlarge Picture
Picture of unidentified spider Enlarge Picture
Picture of unidentified spider Enlarge Picture
Picture of Herpyllus ecclesiasticus (Eastern Parson Spider) - Dorsal Enlarge Picture
Picture of Pholcus spp. - Male - Lateral Enlarge Picture
Picture of unidentified spider Enlarge Picture
Picture of unidentified spider Enlarge Picture
Picture of Steatoda triangulosa (Triangulate Cobweb Spider) - Dorsal Enlarge Picture
Picture of Dolomedes tenebrosus (Dark Fishing Spider) - Dorsal Enlarge Picture
Picture of Dysdera crocata (Woodlouse Hunter) - Dorsal Enlarge Picture
Picture of Herpyllus ecclesiasticus (Eastern Parson Spider) - Dorsal Enlarge Picture
Picture of unidentified spider Enlarge Picture
Picture of Philodromus spp. - Dorsal Enlarge Picture
Picture of Philodromus spp. - Dorsal Enlarge Picture
Picture of Lycosidae (Wolf Spiders) - Ventral Enlarge Picture
Picture of Amaurobius ferox (Black Lace-Weaver) - Male - Dorsal Enlarge Picture
Picture of Dysdera crocata (Woodlouse Hunter) - Female - Dorsal Enlarge Picture
Picture of Steatoda triangulosa (Triangulate Cobweb Spider) - Dorsal Enlarge Picture
Picture of Araneus marmoreus (Marbled Orb-weaver) - Female - Dorsal Enlarge Picture
Picture of Latrodectus spp. (Widow Spiders) - Female - Egg Sacs,Webs Enlarge Picture
Picture of Argiope spp. (Garden Orb-weavers) - Male,Female - Ventral,Webs,Prey Enlarge Picture
Picture of Platycryptus undatus (Tan Jumping Spider) - Dorsal Enlarge Picture
Picture of Neoscona arabesca (Arabesque Orb-weaver) - Female - Dorsal,Webs Enlarge Picture
Picture of Phidippus audax (Bold Jumper) - Male - Dorsal,Eyes Enlarge Picture
Picture of Parasteatoda tepidariorum (Common House Spider) - Female - Egg Sacs,Lateral,Spiderlings,Webs Enlarge Picture
Picture of Phidippus audax (Bold Jumper) - Male - Eyes Enlarge Picture
Picture of Araneus diadematus (Cross Orb-weaver) - Female - Dorsal,Webs,Prey Enlarge Picture