Notophthalmus viridescens (Red-Spotted Newt)
- Photos, description, and map of distribution.
- http://www.npwrc.usgs.gov/resource/herps/amphibid/species/rsnewt.htm

Notophthalmus viridescens viridescens (Red-Spotted Newt)
- Photos and brief description.
- http://www.bio.davidson.edu/projects/herpcons/herps_of_NC/salamanders/notvir.html

Notophthalmus meridionalis (Black-spotted Newt)
- Physical features, distribution, breeding, and conservation status.
- http://elib.cs.berkeley.edu/cgi-bin/amphib_query?where-genus=Notophthalmus&where-species=meridionalis

Notophthalmus perstriatus (Striped Newt)
- Life history, ecology, behavior, and conservation status of this species. Includes a photo.
- http://elib.cs.berkeley.edu/cgi-bin/amphib_query?where-genus=Notophthalmus&where-species=perstriatus

Notophthalmus viridescens (Eastern Newt or Red-spotted Newt)
- Detailed species account includes facts, images, and a taxonomy chart.
- http://animaldiversity.ummz.umich.edu/site/accounts/information/Notophthalmus_viridescens.html