- Adult: stout newt with relatively small head, short limbs, and a vertically compressed tail.
Eft: rounded tail.
- Adult: yellow-brown to dark brown dorsum and yellow venter with numerous black spots n ventral surface.
Eft: red-orange color with little spotting.
As adults, aquatic Notophthalamus viridescens grow to 6-13 cm (2.5-5.5 in) total length.
Terrestrial efts of this species grow between 3-8 cm (1.4-3.4 in) in total length.
In North America, Notophthalamus viridescens is found from Lake Superior south to Texas and eastward to South Carolina.
Adult Notophthalamus viridescens find shelter among submerged rocks and feed on insects, mollusks, leeches, and small amphibians. They have toxic secretions from skin glands with which to deter predators. The eft is terrestrial and is active during or after rains.
Breeding in occurs in late winter to early spring. Females lay up to 200-400 eggs and attach them singly to submerged vegetation in shallow waters.
Adult Notophthalamus viridescens are found in the shallow waters of streams with vegetative cover, such as in ditches, swamps, and ponds. Land-stage efts are found on the forest floor.
The eastern newt is not a protected species in Texas and can be legally collected with a hunting license.
In Texas, Notophthalamus viridescens is found in the eastern third of the state.