Notophthalmus viridescens,the eastern newt is a common newt found across eastern North America. The adults are not as striking as the juveniles (efts), which are brightly colored to warn you of their toxins.
Shown here is an individual eft we stumbled across in high point state park, New Jersey. The swamps of the High Point are unique and are biologically diverse. You can learn more about the bog here on this excellent blog that goes through its natural history and its unusual evolution.