Variegated Fritillary (Euptoieta claudia)
- Physical traits, life history, flight period, diet, and habitat. Includes photos and range map.
- http://www.butterfliesandmoths.org/species?l=1672

Arctic Fritillary (Boloria chariclea)
- Species account describes the life history, flight period, caterpillar hosts, adult food, and habitat of this species. Distribution map and photo provided.
- http://www.butterfliesandmoths.org/species?l=1703

Silver-bordered Fritillary (Boloria selene)
- Photos, distribution map, and facts about the life history and ecology of this species.
- http://www.butterfliesandmoths.org/species?l=1693

Heliconius.org
- Site for scientists studying the ecology and evolution of butterflies in the genus Heliconius. Includes genetics database and links to related resources.
- http://heliconius.cap.ed.ac.uk/butterfly/

Evolution and Speciation Patterns in the Genus Speyeria
- Graduate student research on the phylogeny of a North American fritillary.
- http://www.life.uiuc.edu/paige/williams/sp.html

Meadow Fritillary (Boloria bellona)
- Photo, physical description, range, habitat, ecology, and reproduction.
- http://imnh.isu.edu/digitalatlas/bio/insects/butrfly/famnymph/bobef.htm

Regal Fritillary (Speyeria idalia)
- Photo of male and female, distinguishing characteristics, range, behavior, and cause of decline.
- http://www.gpnc.org/regal.htm

Great Spangled Fritillary (Speyeria cybele)
- Physical description, range, abundance in Canada, flight period, and life cycle. Includes photos.
- http://www.virtualmuseum.ca/Exhibitions/Butterflies/english/gallery/nsnb_species/ns_19_GSFup.html

Atlantis Fritillary (Speyeria atlantis atlantis)
- Photos of this species taken in Michigan.
- http://vireos.com/atlantisfrit.html