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This picture was taken while hiking on the Mill Creek Falls Trail in York County, back on Sept. 18, 2019. This trail is on River Road in Airville, just over the Norman Wood Bridge.

This picture was taken while hiking on the Mill Creek Falls Trail in York County, back on Sept. 18, 2019. This trail is on River Road in Airville, just over the Norman Wood Bridge from Lancaster County.

Pickerel frogs (Lithobates palustris) are medium-sized, gray or tan, and can be recognized by the seven to 21 irregular rectangular dark brown spots on their back. The front toes of pickerel frogs are not webbed, making them more fit for terrestrial life.

They are the only poisonous frogs native to the United States. They produce toxic skin secretions that are irritating to humans and can be fatal to other small animals, especially other amphibians. Many frog-eating snakes avoid these frogs for this reason.

THE METHOD: Shot with a Sony a9 and Sony FE 24-70 F4 ZA OSS (at 105 mm in APS-C format) 1/160 of a second at f-4 with an ISO of 1000 in manual mode. Processed in Adobe Photoshop.

Through the Viewfinder is a weekly feature by LNP | LancasterOnline photographers exploring the art of black-and-white and color photography.