- American Goldfinch (Carduelis tristis)
- Reviews description, conservation status, sounds, fun facts, distribution, nesting, diet, and photographs.
- American Goldfinch (Carduelis tristis)
- Information includes migration, conservation, locations in Washington state, diet, behavior, nesting, range maps, images, and sound clips.
- American Goldfinch (Carduelis tristis)
- Gives details on appearance, population, life history, video, call, maps, and classification. From the United States Geological Service.
- ARKive.org: Goldfinch (Carduelis carduelis)
- Looks at other names, size, appearance, locations, habitat, diet, threats, status, and conservation. Includes photographs.
- ARKive.org: Greenfinch (Carduelis chloris)
- Features related species, pictures, description, classification, other names, locations, feeding habits, and conservation.
- ARKive.org: Linnet (Carduelis cannabina)
- Combines photographs and videos with details on status and protection, physical appearance, diet and feeding, threats, conservation, and distribution.
- BirdWeb.org: Lesser Goldfinch (Carduelis psaltria)
- Reviews appearance, reproduction, diet and foraging habits, range and maps, habitat, conservation, and locations in Washington state.
- Common Linnet (Carduelis cannabina)
- British Garden Birds gives statistics, images, description, voice, feeding, nesting, and conservation.
- Enchanted Learning: American Goldfinch
- Features labeled coloring page, description, anatomy, diet, nest and eggs, and classification.
- European Greenfinch (Carduelis chloris)
- Reports appearance, measurements, sound clips, diet, nesting, breeding data, migration, and conservation. With photographs.
- Goldfinch (Carduelis carduelis)
- Examines sounds, video, illustrations, physical appearance, migration, range and habitat, distribution map, and population.
- Greenfinch (Carduelis chloris)
- Gives similar birds, illustrations, where to see them, diet, physical characteristics, numbers, and range map.
- Hoary Redpoll (Carduelis hornemanni)
- From the US Geological Service, covers description, similar birds, life history, map, and taxonomy.
- Lawrence's Goldfinch (Carduelis lawrencei)
- Description, from Audubon WatchList, covers appearance, distribution, population trends, ecology, human impact, and conservation research.
- Lawrence's Goldfinch (Carduelis lawrencei)
- Looks at similar species, diet, foraging behavior, nesting and reproduction, locations and habitat, map, pictures, sounds, and conservation status.
- Lawrence's Goldfinch (Carduelis lawrencei)
- US Geological Service explores appearance, migration, nesting, diet, population counts, and classification information. Includes picture.
- Lesser Goldfinch (Carduelis psaltria)
- Contains physical description, sound, conservation status, other names, images, distribution map, and sounds.
- Lesser Goldfinch (Carduelis psaltria)
- Photograph accompanies identification, migration, habitat, diet, population maps, and taxonomy details.
- Lesser Redpoll (Carduelis cabaret)
- Lists illustrations, status, appearance, social structure, diet, locations, map of range, similar birds, and estimated population.
- Mealy Redpoll (Carduelis flammea)
- Offers drawings, video, description, range and map, population estimates, diet, habitat, and similar species.
- Pine Siskin (Carduelis pinus)
- Furnishes physical description, maps, taxonomy, migration, nesting, and diet information.
- The RSPB: Linnet (Carduelis cannabina)
- Explores UK distribution and map, habitat, status, illustrations, sound and video, related birds, diet, and population.
- Siskin (Carduelis spinus)
- Reports size, coloring, seasonal locations and habitats, population estimates, and diet. Offers illustrations, status, audio, and map.
- Twite (Carduelis flavirostris)
- Combines drawing, audio, video, and range map with facts about endangered status, UK range and habitat, related birds, population, and how to help.
- USGS: Common Redpoll (Carduelis flammea)
- Describes appearance, similar birds, migration, nesting, population map, and classification.
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