Lawrence's Goldfinch (Carduelis lawrencei)
- Photo, identification tips, range maps, and a taxonomy chart for this songbird.
- http://www.mbr-pwrc.usgs.gov/id/framlst/i5310id.html

Hoary Redpoll (Carduelis hornemanni)
- Offers a photo of this bird and its egg. Describes the clutch size and egg size.
- http://www.royalalbertamuseum.ca/vexhibit/eggs/vexeggs/migsalta/hredpl.htm

Goldfinch (Carduelis carduelis)
- Describes this songbird's flocking behavior, its feeding habits, and its place in European folklore.
- http://nzbirds.com/birds/goldfinch.html

Lesser Goldfinch (Carduelis psaltria)
- Fact sheet describes this finch's breeding habitat, courtship displays, nest, eggs, and diet.
- http://www.stanfordalumni.org/birdsite/text/species/Lesser_Goldfinch.html

Common Redpoll (Carduelis flammea)
- Range during irruption and non-irruption years, feeding habits, sound files.
- http://www.birdsource.org/winfin/Comred/coresurv.htm

American Goldfinch (Carduelis tristis)
- Includes a photo, range maps, and facts about this bird's habitat and behavior.
- http://www.nenature.com/AmericanGoldfinch.htm

Lawrence's Goldfinch (Carduelis lawrencii)
- Photos of the breeding male and breeding female of this species.
- http://www.birdphotography.com/species/lago.html

Biology, Keeping, and Breeding of Carduelan Finches.
- Articles, photos, and links for Carduelan finches.
- http://www.cardueliden.de