Arachnids

Most commonly observed introduced arachinids documented using iNaturalist by US state

11 states reported Cross Orbweaver, Araneus diadematus, as the most commonly observed introduced arachnid

9 states reported European Harvestman, Phalangium opilio, as the most commonly observed introduced arachnid

9 states reported Woodlouse Spider, Dysdera crocata, as the most commonly observed  introduced arachnid

7 states reported Triangulate Combfoot, Steatoda triangulosa, as the most commonly observed introduced arachnid

3 states reported Joro Spider, Trichonephila clavata, as the most commonly observed introduced arachnid

2 states reported Brown Widow, Latrodectus geometricus, as the most commonly observed introduced arachnid

2 states reported Gray Wall Jumping Spider, Menemerus bivittatus, as the most commonly observed introduced arachnid

1 state reported Asiatic Wall Jumping Spider, Attulus fasciger, as the most commonly observed introduced arachnid

1 state reported Common Candy-striped Spider, Enoplognatha ovata, as the most commonly observed introduced arachnid

1 state reported Hawaiian Garden Spider, Argiope appensa, as the most commonly observed introduced arachnid

1 state reported Common House Spider, Parasteatoda tepidariorum, as the most commonly observed introduced arachnid

1 state reported Long-bodied Cellar Spider, Pholcus phalangioides, as the most commonly observed introduced arachnid

1 state reported Marbled Cellar Spider, Holocnemus pluchei, as the most commonly observed introduced arachnid

1 state reported Noble False Widow, Steatoda nobilis, as the most commonly observed introduced arachnid

1 state reportedPantropical Jumping Spider, Plexippus paykulli, as the most commonly observed introduced arachnid

1 state reported Zebra Jumping Spider, Salticus scenicus, as the most commonly observed introduced arachnid

Top 10 most commonly observed arachnids in the US (reported on iNaturalist)

1. Yellow Garden Spider, Argiope aurantia - Native to the US (but may be considered introduced in some states)

2. Bold Jumping Spider, Phidippus audax - Native to the US (but may be considered introduced in some states)

3. Tan Jumping Spider, Platycryptus undatus - Native to the US (but may be considered introduced in some states)

4. Orchard Orbweaver, Leucauge venusta - Native to the US (but may be considered introduced in some states)

5. Spinybacked Orbweaver, Gasteracantha cancriformis - Wide distribution (may be considered introduced in some states)

6. American Nursery Web Spider, Pisaurina mira - Wide distribution (may be considered introduced in some states)

7. Golden Silk Spider, Trichonephila clavipes - Native to the US (but may be considered introduced in some states)

8. Green Lynx Spider, Peucetia viridans - Native to the US (but may be considered introduced in some states)

9. Cross Orbweaver, Araneus diadematus - Introduced to the US

10. Banded Garden Spider, Argiope trifasciata - Native to the US (but may be considered introduced in some states)

(last updated November 2023