Passerina cyanea (Indigo Bunting) - Geographic range, physical description, food habits, and behavior of this bird. With photos. - http://animaldiversity.ummz.umich.edu/site/accounts/information/Passerina_cyanea.html
Indigo Bunting (Passerina cyanea) - Photo, range maps, and facts on this bird's habitat and diet. - http://www.nenature.com/IndigoBunting.htm
Lazuli Bunting (Passerina amoena) - Brief fact sheet on this species' displays, nesting, diet, and conservation status. - http://www.stanfordalumni.org/birdsite/text/species/Lazuli_Bunting.html
Varied Bunting (Passerina versicolor) - Facts on this bird's habitat, nest location, breeding, and identifying characteristics. - http://www.mbr-pwrc.usgs.gov/id/framlst/i6000id.html