- All About Birds: American Kestrel
- Bird Guide includes summary and detailed pages, listing appearance, wingspan, sounds, population trends, photographs and range map, seasonal range, and behavior.
- American Kestrel (Falco sparverius)
- From Carolina Raptor Center, provides pictures, taxonomy, size, etymology, coloration, sounds, habitat, range, nesting, and food.
- Animal Diversity: American Kestrel (Falco sparverius)
- Lists range and habitat, photographs, physical features, laying dates by location, pair bonds, seasonal diet, use of nesting boxes, and discussion of names.
- BBC Nature: Kestrel (Falco tinnunculus)
- Gives physical statistics, description, locations, preferred habitat, diet, hunting behavior, nesting, status, and sounds.
- BCAdventure.com: American Kestrel
- Contains description, breeding range, other name, diet, incubation, and nesting information.
- Common Kestrel (Falco tinnunculus)
- Presents classification, migration and wintering, hunting areas, appearance of adults and hatchlings, mating and parenting, lifespan, home ranges, communication, and diet.
- Kestrel
- Covers status, illustrations, sound and video clips, links to related birds, how to help, declines, adaptations, locations, diet, and seasonal ranges.
- Lesser Kestrel (Falco naumanni)
- Offers taxonomic table, size and appearance, breeding and nestlings, social behavior, nesting range and habitat, diet, threats, and protection. From University of Michigan ADW.
- Mauritius Kestrel (Falco punctatus)
- ARKive.org describes taxonomy, IUCN status, related species, physical description, life cycle, diet, hunting, and breeding. Includes photos, videos, and glossary.
- Mauritius Kestrel (Falco punctatus)
- Animal Diversity explains habitat introduction and adaptation, dimorphism, reproductive features, social behavior, diet, population history, and threats.
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