
Adult Eastern Newt - Notophthalmus viridescens
I think this is a male because if you look at its rear, you can see some swollen parts, which I think is its cloaca. During breeding season, males can be distinguished from females by a yellowish, swollen cloaca.
See here for more detail:
Habitat: Woodland pond

The eastern newt or red-spotted newt is a common salamander of eastern North America. Eastern newts dwell in wet forests with small lakes or ponds. They can coexist in an aquatic environment with small, non-carnivorous fish, however, their skin secretes a poisonous substance when the newt is threatened or injured. They have a lifespan of 12 to 15 years in the wild, and may grow to 5 inches in length.
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