Pickerel Frog (Lithobates palustrus)

Perusing my pictures on my computer, I stumbled across a picture I took at my lake house last summer of a pickerel frog (Lithobates palustrus).  I took this picture down in the dense vegetation around the corner from my dock.  The specimen was approximately two and a half inches in size, definitely a mature adult.  It's easily distinguishable as a pickerel frog from its prominent dorsolateral ridges and square-like camouflage patterning.  Lithobates are considered the "true frogs," laying their eggs in water, going through a tadpole stage, and maturing, only to continue to live in and around a water source.  The specimen I observed appears to be a male, as it was making its low-pitched, snore-like call as I approached for the picture.  I normally collect smaller specimens around the grassy areas just above the water line, but the larger individuals tend to reside around the pond.  L. palustris seems (from what I've seen) to have a much larger population around my lake than other common species like L. catesbeianus or L. clamitans.