Siren lacertina (Greater Siren)
- Image and brief description.
- http://www.bio.davidson.edu/projects/herpcons/herps_of_NC/salamanders/sirlac.html

Siren intermedia (Lesser Siren)
- Detailed description of physical traits and facts on habitat, breeding, diet, and vocalizations.
- http://elib.cs.berkeley.edu/cgi-bin/amphib_query?where-genus=Siren&where-species=intermedia