Doug Wechsler / Garden cenitipede (Symphyla sp) Wissahickon Valley Park, Philadelphia, Pennsylvania, USA, June.

Doug Wechsler / Sawfly eggs (Argidae) on underside of hickory leaf, Fort Washington State Park, Philadelphia, Pennsylavania, USA. August.

Doug Wechsler / Red-eared slider (Trachemys scripta) and Painted turtle (Chrysemy picata) basking on log, Morris Arboretum, Philadelphia, Pennsylvania, USA, April.

Doug Wechsler / Leafhopper (Rusoana querci) nymph on white oak, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.

Doug Wechsler / Plant bug (Hyaliodes harti) on white oak, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.

Doug Wechsler / Pavement ant (Tetramorium) alate, Philadelphia, Pennsylvania, USA, July.

Doug Wechsler / Pale green assassin bugs (Zelus luridus) hatching from egg mass, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.

Doug Wechsler / Oak lacebug eggs (Corythuca arucata) on white oak leaf, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.

Doug Wechsler / Oak lacebug eggs (Corythuca arucata) laying eggs on white oak leaf, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.

Doug Wechsler / Oak lacebug (Corythuca arcuata) nymphs on white oak leaf, Philadelphia, Pennsylvania, USA, July.

Doug Wechsler / Oak Lacebug (Corythuca arcuata) newly metamorphosed; Fort Washington State Park, Philadelphia, Pennsylvania, USA, July.

Doug Wechsler / Northern water snake (Nerodia sipedon sipedon) mating behavior; Morris Arboretum wetlands, Pennsylvania, Philadelphia, Pennsylavania, USA. May.

Doug Wechsler / Aphids (Myzocallis) on White oak leaf, Pennsylvania, Philadelphia, Pennsylavania, USA. May.

Doug Wechsler / Aphid (Myzocallis sp) giving birth, Fort Washington State Park, Montgomery County, Philadelphia, Pennsylvania, USA, October.

Doug Wechsler / Monarch butterfly ( Danaus plexippus) egg on common milkweed; Philadelphia, Pennsylvania, USA. August.

Doug Wechsler / Milkweed stem weevil (Rhyssomatus lineaticollis) feeding on common milkweed sap Morris Arboretum, Philadelphia, Pennsylavania, USA. August.

Doug Wechsler / Megachilid bee (Megachilidae) on butterflyweed (Asclepias tuberosa) French Creek State Park, Philadelphia, Pennsylavania, USA

Doug Wechsler / Mealy plum aphids (Hylopterus pruni) on Reed (Phragmites) French Creek State Park, Philadelphia, Pennsylvania, USA, June.

Doug Wechsler / Leafhopper (Coelidia olitoria) Philadelphia, Pennsylvania, USA,

Doug Wechsler / Ferruginous carpenter ant (Camponotus chromaiodes) alates, Fort Washington State Park, Philadelphia, Pennsylvania, USA

Doug Wechsler / False milkweed bug (Lygaeus turcicus) Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / False mealworm beetle (Alobates pensylvanica) head, Fort. Washington State Park, Philadelphia, Pennsylvania, USA. April.

Doug Wechsler / Eastern subterranean termite (Reticulitermes flavipes) soldier and worker, Fort Washington State Park; Philadelphia, Pennsylvania, USA. April.

Doug Wechsler / Eastern chipmunk (Tamias striatus) gathering chestnuts, Chestnut Hill, Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / Eastern chipmunk (Tamias striatus) gathering white oak acorns in cheek pouch, Chestnut Hill, Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / Eastern chipmunk (Tamias striatus) gathering white oak acorns in cheek pouch, Chestnut Hill, Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / Eastern chipmunk (Tamias striatus) gathering white oak acorns in cheek pouch, Chestnut Hill, Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / Eastern chipmunk (Tamias striatus) gathering white oak acorns in cheek pouch, Chestnut Hill, Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / Eastern chipmunk (Tamias striatus) gathering white oak acorns in cheek pouch, Chestnut Hill, Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / Eastern chipmunk (Tamias striatus) gathering white oak acorns in cheek pouch, Chestnut Hill, Philadelphia, Pennsylvania, USA, September.

Doug Wechsler / Dogbane beetle (Chrysochus auratus) on dogbane, Crossways Preserve, Philadelphia, Pennsylvania, USA, August.

Doug Wechsler / Chamaemyiid (Chamaemyiidae) fly larva predator on Mealy plum aphid (Hyalopterus pruni) Philadelphia, Pennsylvania, USA French Creek State Park

Doug Wechsler / American toad tadpoles (Anaxyrus americanus) Philadelphia, Pennsylvania, USA, April.

Doug Wechsler / American toad tadpoles (Bufo americanus) eight days after hatching. Philadelphia, Pennsylvania, USA

Doug Wechsler / American toad (Bufo americanus) male calling, vocal sac inflated, Philadelphia, Pennsylvania, USA. May.

Doug Wechsler / American toad tadpole (Bufo americanus) metamorphosing, Philadelphia, Pennsylvania, USA, May.

Doug Wechsler / American toad (Bufo americanus) tadpole metamorphosis. Philadelphia, Pennsylvania, USA, May.

Doug Wechsler / Two-striped Planthopper nymph (Acanalonia bivittata) Schuylkill Centre for Environmental Education, Philadelphia, USA July

Doug Wechsler / Gray hairstreak butterfly (Stymon melinus) Philadelphia, USA September