Large Orange Sulphur (Phoebis agarithe)
- Life history, physical traits, and ecology. Provides photos and distribution map.
- http://www.butterfliesandmoths.org/species?l=1442

Orange-barred Sulphur (Phoebis philea)
- Fact sheets describes physical characteristics, diet, flight period, range, and habitat. Photo provided.
- http://www.olbrich.org/special%20events/Blooming_Butterflies/Butterfly%20Data/orange_barred_sulphur.htm

Southern Dogface (Zerene cesonia)
- Photos of this species taken in Texas.
- http://www.vireos.com/southerndogface.html

Pink-Edged Sulphur (Colias interior)
- Physical traits, range, habitat, diet, and ecology. Includes an image.
- http://imnh.isu.edu/digitalatlas/bio/insects/butrfly/fampier/coinf.htm

Little Yellow
- Image of this species.
- http://www.images.on.ca/JayC/pages/Little_Yellow.htm

Orange Sulphur (Colias eurytheme)
- Identification, life history, habitat, range, host plants, and flight period. Includes photo.
- http://www.virtualmuseum.ca/Exhibitions/Butterflies/english/gallery/on_species/CMN_Colias_eurytheme.html