• Results for
    • Pennsylvania
  • (542)
Juvenile Timber rattlesnakes (Crotalus horridus) massed together at nest site, Pennsylvania, USA. - John Cancalosi
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John Cancalosi / Juvenile Timber rattlesnakes (Crotalus horridus) massed together at nest site, Pennsylvania, USA.
Timber rattlesnakes (Crotalus horridus) at nest site with young, Pennsylvania, USA. - John Cancalosi
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John Cancalosi / Timber rattlesnakes (Crotalus horridus) at nest site with young, Pennsylvania, USA.
Group of gravid female Timber rattlesnakes (Crotalus horridus) basking before giving birth, Pennsylvania, USA, July. - John Cancalosi
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John Cancalosi / Group of gravid female Timber rattlesnakes (Crotalus horridus) basking before giving birth, Pennsylvania, USA, July.
Female Timber rattlesnake (Crotalus horridus) at nest site with newborn young, Pennsylvania, USA, September. - John Cancalosi
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John Cancalosi / Female Timber rattlesnake (Crotalus horridus) at nest site with newborn young, Pennsylvania, USA, September.
American toad (Bufo americanus) crossing road at night in front of car headlights, Philadelphia, Pennsylvania, USA, March - Doug Wechsler
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Doug Wechsler / American toad (Bufo americanus) crossing road at night in front of car headlights, Philadelphia, Pennsylvania, USA, March
Abstract apartment and office buildings, Philadelphia, Pennsylvania, USA - Michael Hutchinson
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Michael Hutchinson / Abstract apartment and office buildings, Philadelphia, Pennsylvania, USA
American Toad {Bufo americanus} male calling, his vocal sac vibrations causing ripples in the water,  Pennsylvania, USA - Doug Wechsler
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Doug Wechsler / American Toad {Bufo americanus} male calling, his vocal sac vibrations causing ripples in the water, Pennsylvania, USA
Timber rattlesnakes emerging from den {Crotalus horridus} Pennsylvania, USA - John Cancalosi
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John Cancalosi / Timber rattlesnakes emerging from den {Crotalus horridus} Pennsylvania, USA
Bullfrog male in garden pond {Rana catesbeiana} Pennsylvania, USA. - Doug Wechsler
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Doug Wechsler / Bullfrog male in garden pond {Rana catesbeiana} Pennsylvania, USA.
Bullfrog female by garden pond {Rana catesbeiana} Pennsylvania, USA - Doug Wechsler
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Doug Wechsler / Bullfrog female by garden pond {Rana catesbeiana} Pennsylvania, USA
American alligator (A. mississippiensis) teeth. C. PY, USA. Pennsylvania - Niall Benvie
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Niall Benvie / American alligator (A. mississippiensis) teeth. C. PY, USA. Pennsylvania
Fall leaf pattern close-up, eastern hardwood forest, Allegheny National Forest, Pennsylvania - Gerry Ellis
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Gerry Ellis / Fall leaf pattern close-up, eastern hardwood forest, Allegheny National Forest, Pennsylvania
Fall leaf pattern close up, eastern hardwood forest, Allegheny National Forest, Pennsylvania - Gerry Ellis
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Gerry Ellis / Fall leaf pattern close up, eastern hardwood forest, Allegheny National Forest, Pennsylvania
Dandelion (Taraxacum officinale) with bee covered with pollen, Pennsylvania - Tim Fitzharris
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Tim Fitzharris / Dandelion (Taraxacum officinale) with bee covered with pollen, Pennsylvania
Amazon River Dolphin (Inia geoffrensis) melon on forehead used for sonar, Pittsburg Aquarium - Norbert Wu
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Norbert Wu / Amazon River Dolphin (Inia geoffrensis) melon on forehead used for sonar, Pittsburg Aquarium
Female Timber rattlesnake (Crotalus horridus) at nest site with young, Pennsylvania, USA. - John Cancalosi
01640006
John Cancalosi / Female Timber rattlesnake (Crotalus horridus) at nest site with young, Pennsylvania, USA.
Timber rattlesnakes (Crotalus horridus) with young at nest site, Pennsylvania, USA. - John Cancalosi
01640005
John Cancalosi / Timber rattlesnakes (Crotalus horridus) with young at nest site, Pennsylvania, USA.
Timber rattlesnake (Crotalus horridus) females coiled up in leaf litter, newborn young sheltering under rock. At maternity site, Pennsylvania, USA. August. - John Cancalosi
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John Cancalosi / Timber rattlesnake (Crotalus horridus) females coiled up in leaf litter, newborn young sheltering under rock. At maternity site, Pennsylvania, USA. August.
Timber rattlesnake (Crotalus horridus) females in undergrowth at maternity site, Pennsylvania, USA. August. - John Cancalosi
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John Cancalosi / Timber rattlesnake (Crotalus horridus) females in undergrowth at maternity site, Pennsylvania, USA. August.
Timber rattlesnake (Crotalus horridus) females and newborn young at maternity site. Pennsylvania, USA. August. - John Cancalosi
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John Cancalosi / Timber rattlesnake (Crotalus horridus) females and newborn young at maternity site. Pennsylvania, USA. August.
Slimy salamander (Plethodon glutinosus) on leaves in pool of water. Pennsylvania, USA. May. - John Cancalosi
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John Cancalosi / Slimy salamander (Plethodon glutinosus) on leaves in pool of water. Pennsylvania, USA. May.
Amish man mowing hay with three horses. Lancaster County, Pennsylvania, USA. June 2019. - John Cancalosi
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John Cancalosi / Amish man mowing hay with three horses. Lancaster County, Pennsylvania, USA. June 2019.
Amish man rowing hay with horse-drawn equpment. Lancaster County, Pennsylvania, USA. June 2019. - John Cancalosi
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John Cancalosi / Amish man rowing hay with horse-drawn equpment. Lancaster County, Pennsylvania, USA. June 2019.
Amish man driving horses pulling machinery for rowing up hay for baling, Lancaster county, Pennsylvania, USA, June 2019 - John Cancalosi
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John Cancalosi / Amish man driving horses pulling machinery for rowing up hay for baling, Lancaster county, Pennsylvania, USA, June 2019
Timber rattlesnakes (Crotalus horridus), gravid females basking to bring young to term, Pennsylvania - John Cancalosi
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John Cancalosi / Timber rattlesnakes (Crotalus horridus), gravid females basking to bring young to term, Pennsylvania
Brown lacewing (Hemerobiidae) larva feeding on Oleander Aphid (Aphis nerii) Philadelphia, USA, June. - Doug Wechsler
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Doug Wechsler / Brown lacewing (Hemerobiidae) larva feeding on Oleander Aphid (Aphis nerii) Philadelphia, USA, June.
Ambush bug (Phymata sp) on Black-eyed susan (Rudbeckia hirta)  on shield bug prey, Morris Arboretum, Philadelphia, Pennsylavania, USA. August. - Doug Wechsler
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Doug Wechsler / Ambush bug (Phymata sp) on Black-eyed susan (Rudbeckia hirta) on shield bug prey, Morris Arboretum, Philadelphia, Pennsylavania, USA. August.
Wide-footed treehopper (Campylenchia latipes) on Black-eyed susan (Rudbeckia hirta) stem, Morris Arboretum, Philadelphia, Pennsylavania, USA. August. - Doug Wechsler
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Doug Wechsler / Wide-footed treehopper (Campylenchia latipes) on Black-eyed susan (Rudbeckia hirta) stem, Morris Arboretum, Philadelphia, Pennsylavania, USA. August.
Wavy-lined emerald moth caterpillar (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Morris Arboretum, Philadelphia, Pennsylava... - Doug Wechsler
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Doug Wechsler / Wavy-lined emerald moth caterpillar (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Morris Arboretum, Philadelphia, Pennsylava...
Wavy-lined emerald moth caterpillar (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Morris Arboretum, Philadelphia, Pennsylava... - Doug Wechsler
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Doug Wechsler / Wavy-lined emerald moth caterpillar (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Morris Arboretum, Philadelphia, Pennsylava...
Wavy-lined emerald moth caterpillar (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Morris Arboretum, Philadelphia, Pennsylava... - Doug Wechsler
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Doug Wechsler / Wavy-lined emerald moth caterpillar (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Morris Arboretum, Philadelphia, Pennsylava...
Wavy-lined Emerald Moth (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta)  Crossways Preserve, Montgomery County, Philadelphia,... - Doug Wechsler
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Doug Wechsler / Wavy-lined Emerald Moth (Synchlora aerata) which camouflages itself by attaching parts of flower to itself, on Black-eyed susan (Rudbeckia hirta) Crossways Preserve, Montgomery County, Philadelphia,...
Walnut lace bug (Corythuca juglandis) on Manchurian Walnut leaf; Morris Arboretum, Philadelphia, Pennsylvania, USA, August. - Doug Wechsler
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Doug Wechsler / Walnut lace bug (Corythuca juglandis) on Manchurian Walnut leaf; Morris Arboretum, Philadelphia, Pennsylvania, USA, August.
Vinegar flies / Fruit flies (Drosophila sp.) feeding on fermented sap or alcohol flux, Fort Washington State Park, Montgomery County, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Vinegar flies / Fruit flies (Drosophila sp.) feeding on fermented sap or alcohol flux, Fort Washington State Park, Montgomery County, Pennsylvania, USA, June.
Two-striped planthopper (Acanalonia bivittata)  nymph, Four Mills Nature Reserve, Montgomery County, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Two-striped planthopper (Acanalonia bivittata) nymph, Four Mills Nature Reserve, Montgomery County, Pennsylvania, USA, June.
Two-striped planthopper (Acanalonia bivittata)  nymph, Four Mills Nature Reserve, Montgomery County, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Two-striped planthopper (Acanalonia bivittata) nymph, Four Mills Nature Reserve, Montgomery County, Pennsylvania, USA, June.
Thistle tortoise beetle (Cassida rubiginosa) which carries its droppings as camouflage, Crossways Preserve, Montgomery County, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Thistle tortoise beetle (Cassida rubiginosa) which carries its droppings as camouflage, Crossways Preserve, Montgomery County, Pennsylvania, USA, June.
Thistle tortoise beetle (Cassida rubiginosa) which carries its droppings as camouflage, Crossways Preserve, Montgomery County, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Thistle tortoise beetle (Cassida rubiginosa) which carries its droppings as camouflage, Crossways Preserve, Montgomery County, Pennsylvania, USA, June.
Thistle tortoise beetle (Cassida rubiginosa) which carries its droppings as camouflage, Crossways Preserve, Montgomery County, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Thistle tortoise beetle (Cassida rubiginosa) which carries its droppings as camouflage, Crossways Preserve, Montgomery County, Pennsylvania, USA, June.
Garden cenitipede (Symphyla sp) Wissahickon Valley Park, Philadelphia, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Garden cenitipede (Symphyla sp) Wissahickon Valley Park, Philadelphia, Pennsylvania, USA, June.
Garden cenitipede (Symphyla sp) Wissahickon Valley Park, Philadelphia, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Garden cenitipede (Symphyla sp) Wissahickon Valley Park, Philadelphia, Pennsylvania, USA, June.
Sweat bee nest (Augochlora pura) in rotten log, entrance to chamber on right, Fort Washington State Park, Montgomery County, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Sweat bee nest (Augochlora pura) in rotten log, entrance to chamber on right, Fort Washington State Park, Montgomery County, Pennsylvania, USA, June.
Springtail (Vertagopus pseudocinereus) in rotten log; Armentrout Preserve, Montgomery County, Philadelphia, Pennsylvania, USA, September. - Doug Wechsler
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Doug Wechsler / Springtail (Vertagopus pseudocinereus) in rotten log; Armentrout Preserve, Montgomery County, Philadelphia, Pennsylvania, USA, September.
Sawfly eggs (Argidae) on underside of hickory leaf, Fort Washington State Park, Philadelphia, Pennsylavania, USA. August. - Doug Wechsler
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Doug Wechsler / Sawfly eggs (Argidae) on underside of hickory leaf, Fort Washington State Park, Philadelphia, Pennsylavania, USA. August.
Red-eared slider (Trachemys scripta) and Painted turtle (Chrysemy picata) basking on log, Morris Arboretum, Philadelphia, Pennsylvania, USA, April. - Doug Wechsler
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Doug Wechsler / Red-eared slider (Trachemys scripta) and Painted turtle (Chrysemy picata) basking on log, Morris Arboretum, Philadelphia, Pennsylvania, USA, April.
Leafhopper (Rusoana querci) nymph on white oak, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Leafhopper (Rusoana querci) nymph on white oak, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.
Plant bug (Hyaliodes harti) on white oak, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Plant bug (Hyaliodes harti) on white oak, Fort Washington State Park, Philadelphia, Pennsylvania, USA, June.
Peck's skipper butterfly (Polites peckius) feeding on flowers, Crossways Preserve Montgomery County, Philadelphia, Pennsylvania, USA, June. - Doug Wechsler
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Doug Wechsler / Peck's skipper butterfly (Polites peckius) feeding on flowers, Crossways Preserve Montgomery County, Philadelphia, Pennsylvania, USA, June.
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