Doug Wechsler / Exuvium (shed skin) of Chinese mantid (Tenodera aridifolia) on leaf. Philadelphia, PA

Doug Wechsler / Milkweed / Oleander aphids (Aphis nerii) on common milkweed (Asclepias syriaca). Philadelphia, PA. August

Doug Wechsler / Milkweed tussock moth / tiger moth caterpillars (Euchaetes egle) first instar and egg mass on common milkweed. Philadelphia, Pennsylvania, USA. July

Doug Wechsler / Mason bee (Osmia sp) mud nest showing chambers and larvae. Penn Valley, PA, USA

Doug Wechsler / Large milkweed bug nymphs (Oncopeltus fasciatus) on common milkweed pod (Asclepias syriaca). Philadelphia, Pennsylvania, USA. July

Doug Wechsler / Imperial moth (Eacles imperialis) on leaves. Philadelphia, PA, USA

Doug Wechsler / Green Stinkbug nymphs (Acrosternum hilare / Chinavia hilaris) on milkweed leaf. Philadelphia, PA, USA

Doug Wechsler / American elderberry (Sambucus canadensis) in flower. Philadelphia, PA, USA

Doug Wechsler / Male and female American toads (Bufo americanus) in amplexus on road at night, with car headlights behind. Philadelphia, Pennsylvania, USA

Doug Wechsler / Male and female American toads (Bufo americanus) in amplexus on road at night, with car headlights behind. Philadelphia, Pennsylvania, USA. March

Doug Wechsler / Girl watching male and female American toads (Bufo americanus) in amplexus crossing road at night; Philadelphia, Pennsylvania, USA. March

Doug Wechsler / American toad (Bufo americanus) toadlet with tail: metamorphosing; Philadelphia, Pennsylvania, USA, June