Snetsinger’s purseweb spider (Atypus snetsingeri). Saul Wildlife Preserve, Rose Valley, PA.
Theridion frondeum (eastern long-legged cobweaver) on a leaf. Palps not dissected so there’s a remote chance this could be the much rarer Theridion albidum.
Grass spider (Agelenopsis sp.) eating another spider. Swarthmore, PA.
Grass spider (Agelenopsis pennsylvanica). ID tentative. Mohonk Mountain House, New Paltz, NY.
Funnel weaver (Agelenopsis sp.). ID tenative. Swarthmore, PA.
Ariadna bicolor tunnel. ID not confirmed. Mohonk Mountain House, New Paltz, NY.
Anaptomecus longiventris. San Carlos, Alajuela, Costa Rica.
Anyphaena pectorosa on snow. ID tentative. Hildacy Preserve, Media, PA.
Ghost spider (Anyphaena sp.) in retreat next to cynipid gall. Hildacy Preserve, Media, PA.
Marbled orbweaver (Araneus marmoreus). Maurice Bower Saul Wildlife Sanctuary, Rose Valley, PA.
Marbled orbweaver (Araneus marmoreus). Maurice Bower Saul Wildlife Sanctuary, Rose Valley, PA.
Marbled orbweaver (Araneus marmoreus). John Heinz National Wildlife Refuge, Philadelphia, PA.
Lattice orbweaver (Araneus thaddeus) in retreat. Swarthmore, PA.
Hawaiian garden spider (Argiope appensa) courtship. Kailua-Kona, Hawai’i.
Hawaiian garden spider (Argiope appensa) courtship. Kailua-Kona, Hawai’i.
Hawaiian garden spider (Argiope appensa) courtship. Kailua-Kona, Hawai’i.
Hawaiian garden spider (Argiope appensa) courtship. Kailua-Kona, Hawai’i.
Juvenile black-and-yellow Argiope ( Argiope aurantia) on stabilimentum. Paines Creek Historic Park, Bowling Green, Florida.
Juvenile black-and-yellow Argiope ( Argiope aurantia). Paines Creek Historic Park, Bowling Green, Florida.
Juvenile black-and-yellow Argiope ( Argiope aurantia). Paines Creek Historic Park, Bowling Green, Florida.
Juvenile black-and-yellow Argiope ( Argiope aurantia). Paines Creek Historic Park, Bowling Green, Florida.
Yellow garden spider (Argiope aurantia) on stabilimentum. Rushton Woods Preserve, Willistown, PA.
Florida garden spider (Argiope florida) in web. Highlands Hammock State Park, Sebring, FL.
Argiope submaronica on stabilimentum. Formerly Argiope savignyi. La Selva, Costa Rica.
Ariadna bicolor tunnel. ID not confirmed. Mohonk Mountain House, New Paltz, NY.
Hildacy Farm Preserve, Media, PA.
Two webs of Snetsinger’s purseweb spider (Atypus snetsingeri). Hildacy Preserve, Media, PA.
Tube of Snetsinger’s purseweb spider (Atypus snetsingeri).
Snetsinger’s purseweb spider (Atypus snetsingeri). Hildacy Preserve, Media, PA.
Snetsinger’s purseweb spider (Atypus snetsingeri). Saul Wildlife Preserve, Rose Valley, PA.
Ant-mimic sac spider. Either Castianeira floridiana or C. descripta. Highlands Hammock State Park, Sebring, FL.
Ant-mimic sac spider. Either Castianeira floridana or C. descripta. Highlands Hammock State Park, Sebring, FL.
Jumping spider (Colonus sp.) with fly. Swarthmore, PA.
Dark fishing spider (Dolomedes tenebrosus). John Heinz National Wildlife Refuge, Philadelphia, PA.
Dark fishing spider (Dolomodes tenebrosus) on log. John Heinz National Wildlife Refuge. Philadelphia, PA.
Dark fishing spider (Dolomedes tenebrosus) on leaf. ID tentative. John Heinz National Wildlife Refuge, Philadelphia, PA.
Dark fishing spider (Dolomedes tenebrosus) with regrown R-II leg. Mohonk Mountain House, New Paltz, NY.
Dark fishing spider (Dolomedes tenebrosus) with regrown R-II leg. Mohonk Mountain House, New Paltz, NY.
Dark fishing spider (Dolomedes tenebrosus) in tree hole. ID tentative. John Heinz National Wildlife Refuge, Philadelphia, PA.
Dark fishing spider (Dolomedes tenebrosus). John Heinz National Wildlife Refuge, Philadelphia, PA.
Six-spotted fishing spider (Dolomedes triton) in vernal pond. Hildacy Preserve, Media, PA.
Banded fishing spider (Dolomedes vittatus) on bench near stream. ID tentative. Hedgerow Theater, Rose Valley, PA.
Banded fishing spider (Dolomedes vittatus). Ridley Creek State Park, Edgemont, PA.
Dark fishing spider (Dolomedes tenebrosus) on tree. ID tentative. Saul Wildlife Sanctuary, Rose Valley, PA.
Eris floridana. Zolfo Springs, FL.
Spiderlings of Eris floridana inside nest made of pine needles. Zolfo Springs, FL.
Juvenile Eris floridana. Found on pine tree. Zolfo Springs, FL.
Eris floridana. Zolfo Springs, FL.
Spiderlings of Eris floridana inside nest made of pine needles. Zolfo Springs, FL.
Eris (likely E. militaris) with a Pollenia sp. Rose Tree Park, Media, PA.
Riparian duncecap orbweaver (Eustala cepina). ID tentative. Taylor Memorial Arboretum, Wallingford, PA.
Black-tailed red sheetweb spider (Florinda coccinea). Zolfo Springs, FL.
Black-tailed red sheetweb spider (Florinda coccinea). Zolfo Springs, FL.
Common Hentz jumper (Hentzia palmarum) guarding her eggs. Zolfo Springs, FL.
Common Hetnz jumper (Hentzia palmarum) guarding eggs. Zolfo Springs, FL.
Common Hentz jumper (Hentzia palmarum) guarding her eggs. Zolfo Springs, FL.
Zolfo Springs, FL.
Common Hentz jumper (Hentzia palmarum) in retreat. Female. Eggs are front left. Zolfo Springs, FL.
Common Hentz jumper (Hentzia palmarum) on citrus leaf. Male. Zolfo Springs, FL.
Garden ghost spider (Hibana gracilis) inside silk retreat. Leiper Park, Wallingford, PA.
Garden ghost spider (Hibana gracilis) inside silk retreat. Leiper Park, Wallingford, PA.
Garden ghost spider (Hibana gracilis) inside silk retreat. Leiper Park, Wallingford, PA.
Western black widow (Latrodectus hesperus). Crooked River National Grassland. Madras, Oregon.
Mabel orchard orbweaver (Leucauge argyrobapta). Zolfo Springs, FL.
Leucauge venusta (orchard orbweaver). Hildacy Preserve, Media, PA.
Leucauge venusta (orchard orbweaver). Male. Glen Providence Park, Media, PA.
Orchard orbweaver (Leucauge venusta) on web. Tyler Arboretum, Media, PA.
Lined orbweaver (Mangora gibberosa). Clayton Park, Upper Freehold, NJ.
Mecaphesa sp. Archbold Research Station, Venus, FL.
Mecaphesa californica. Eaton Canyon, LA.
Mecaphesa asperata (northern crab spider). ID is tentative. Mt Cuba Center, DE.
Crab spider (Mecaphesa sp.) lurking in flowers. Mohonk Mountain House, New Paltz, NY.
A female Mecaphesa sp. inside the curved labellum of a canna lily (Canna indica). Zolfo Springs, FL.
Mecaphesa californica. Eaton Canyon, LA.
Basilica orbweaver (Mecynogea lemniscata) with egg cases. Highlands Hammock State Park, Sebring, FL.
Gray wall jumper (Menemerus bivittatus) paralyzed by its prey, a longjawed orbweaver. Zolfo Springs, FL.
Metazygia sp. Zolfo Springs, FL.
Metazygia sp. Zolfo Springs, FL.
Metepeira sp. ID tentative. Madras, Oregon.
Flower crab spider (Misumena sp.) on hydrangea. ID tentative. Mohonk Mountain House, New Paltz, NY.
American green crab spider (Misumessus oblongus). Swarthmore, PA.
Western spotted orbweaver (Neoscona oaxacensis). In the Galápagos this spider is often called (incorrectly) Neoscona cooksoni. The insect caught in the web is probably a yellow paper wasp (Polistes versicolor). Isla Santiago, Galapagos.
Striped lynx (Oxyopes salticus). Kailua-Kona, Hawai’i.
Striped lynx (Oxyopes salticus). Kailua-Kona, Hawai’i.
Striped lynx (Oxyopes salticus). Kailua-Kona, Hawai’i.
Golden jumping spider (Paraphidippus aurantius). Stoneleigh Garden, Villanova, PA.
Golden jumping spider (Paraphidippus aurantius). Hildacy Farm Preserve, Media, PA USA.
Golden jumping spider (Paraphidippus aurantius). Hildacy Farm Preserve, Media, PA USA.
Golden jumping spider (Paraphidippus aurantius). Hildacy Farm Preserve, Media, PA USA.
Peppered jumping spider (Pelegrina galathea) eating a golden-backed snipe fly. Crow’s Nest Preserve, Elverson, PA.
Daring jumping spider (Phidippus audax). Leiper Park, Wallingford, PA.
Paraphidippus princeps (grayish jumping spider)) eating an ant. Hildacy Preserve, Media, PA.
Philodromus barrowsi on Spanish moss. Zolfo Springs, FL.
Philodromus barrowsi on Spanish moss. Zolfo Springs, FL.
Philodromus barrowsi on Spanish moss. Zolfo Springs, FL.
Philodromus barrowsi on Spanish moss. Zolfo Springs, FL.
Nursery web spider (Pisaurina mira). Hildacy Farm Preserve, Natural Lands Trust, Media, PA USA.
American nursery web spider )Pisaurina mira) on grass. Hildacy Preserve, Media, PA.
American nursery web spider (Pisaurina mira). Hildacy Preserve, Media, PA.
American nursery web spider (Pisaurina mira). Ridley Creek State Park, Media, PA.
Newly hatched American nursey web spider (Pisaurina mira). Swarthmore, Pennsylvania.
Newly hatched American nursey web spider (Pisaurina mira). Swarthmore, Pennsylvania.
Ventral view of a newly hatched American nursey web spider (Pisaurina mira). Swarthmore, Pennsylvania.
Nursery web spiders (Pisaurina mira). Hildacy Farm Preserve, Media, PA USA.
Sclerosomatid (Prionostemma) harvestman on a palm trunk. La Selva, Costa Rica.
Jumping sider egg case on yarrow. ID tentative. Crooked River National Grassland, Madras, OR.
Spider web with rime frost. Mohonk Mountain House, New Paltz, NY.
Long-jawed orbweaver (Tetragnatha sp.) guarding egg case. Zolfo Springs, FL.
Long-jawed orbweaver (Tetragnatha sp.). Zolfo Springs, FL.
Long-jawed orbweaver (Tetragnatha sp.) in snow. Hildacy Preserve, Media, PA.
Tetragnatha sp. guarding egg sac. Pioneer Park, Zolfo Springs, FL.
Eastern long-legged cobweaver (Theridion frondeum) in leaf retreat. Swarthmore, PA.
Theridion frondeum (eastern long-legged cobweaver) on a leaf. Palps not dissected so there’s a remote chance this could be the much rarer Theridion albidum.
Eastern long-legged cobweaver (Theridion frondeum) inside retreat. Swarthmore, PA.
Crab spider (Thomisidae) on aster. Elverson, PA.
Broad-faced sac spider (Trachelas tranquillus). Swarthmore, PA.
Golden silk spider weaver (Trichonephila clavipes). Formerly known as Nephila clavipes. La Selva, Costa Rica.
Golden silk orbweaver (Trichonephila clavipes). Vaca Key, Florida.
Golden silk orbweaver (Trichonephila clavipes). Vaca Key, Florida.
Golden silk orbweaver (Trichonephila clavipes). Vaca Key, Florida.
Wolf spider. Archbold Research Station, Venus, FL.
Ground crab spider (Xysticus sp.). Hildacy Preserve, Media, PA.
Ground crab spider (Xysticus sp.). John Heinz National Wildlife Refuge, Philadelphia, PA.