Doug Wechsler / Poison ivy vine (Toxicodendron radicans) climbing up White oak tree (Quercus) Fort Washington State Park, Pennsylvania, USA October

Doug Wechsler / Winnow ant (Aphaenogaster sp) worker carrying pupa to nest, Washington State Park, Pennsylvania, USA July

Doug Wechsler / Winnow ant (Aphaenogaster sp) worker carrying beetle pupa to nest, Washington State Park, Pennsylvania, USA July

Doug Wechsler / Winnow ant (Aphaenogaster sp) worker carrying beetle pupa to nest, Washington State Park, Pennsylvania, USA July

Doug Wechsler / Wrinkled bark beetle (Clinidium sp) in rotten log, Washington State Park, Pennsylvania, USA August

Doug Wechsler / Acrobat ant swarm (Crematogaster sp) winged individuals leaving nest to mate, Washington State Park, Pennsylvania, USA September

Doug Wechsler / Acrobat ant swarm (Crematogaster sp) winged individuals leaving nest to mate, Washington State Park, Pennsylvania, USA September

Doug Wechsler / Acrobat ant swarm (Crematogaster sp) winged individuals leaving nest to mate, Washington State Park, Pennsylvania, USA September

Doug Wechsler / Acrobat ant swarm (Crematogaster sp) winged individuals leaving nest to mate, Washington State Park, Pennsylvania, USA September

Doug Wechsler / Acrobat ant (Crematogaster sp) tending aphids on white oak (Quercus sp) Washington State Park, Pennsylvania, USA September

Doug Wechsler / Acrobat ant (Crematogaster sp) tending aphids on white oak (Quercus sp) Washington State Park, Pennsylvania, USA September

Doug Wechsler / Coiled millipede (Narceus americanus) Washington State Park, Pennsylvania, USA