Bufonidae Family - University of Texas
- Description, geographic distribution and phylogenetic relationships of the family.
- http://www.zo.utexas.edu/research/salientia/bufonidae/bufonidae.html

Atelopus varius - Harlequin Frog
- Description, distribution, habitat, behavior, conservation and references. AmphibiaWeb.
- http://elib.cs.berkeley.edu/cgi-bin/amphib_query?where-genus=Atelopus&where-species=varius

Bufonidae Family - AMNH
- Account of the family which includes scientific description references, and a bibliography.
- http://research.amnh.org/cgi-bin/herpetology/amphibia?record=IQWBENACJXSZSQHY

Bufonidae Family - Living Underworld
- Extensive list of over 400 species, with photos for a small handful of entries.
- http://www.livingunderworld.org/anura/database/bufonidae/

Bufonidae - AmphibiaWeb
- An extensive list of the family from Bufo abatus to Bufo xeros. Contains further details for some species.
- http://elib.cs.berkeley.edu/aw/lists/Bufonidae.shtml

Bufonidae Family - US Forestery Service
- Details of 5 Bufo species, boreas, cognatus, microscaphus, punctatus and woodhousii.
- http://www.fs.fed.us/r4/amphibians/family_bufonidae.htm