- All About Birds: Mute Swan (Cygnus olor)
- Cornell Lab of Ornithology reports description, similar species, general facts, range, habitat, food, behavior, reproduction, and status. Offers images, audio, and map of range.
- All About Birds: Trumpeter Swan (Cygnus buccinator)
- Data, in summary and detail, reviews size and appearance, sound, status, other names, seasonal range and habitat, diet, foraging, images, audio, and map of locations.
- Animal Diversity: Black Swan (Cygnus atratus)
- Explains native and introduced ranges, size, relatives, mating and courting habits, colonies, communication, foods, known predators, and economic importance.
- Black Swan
- Looks at scientific classification, physical appearance, diet, range, habitat, fun facts, threats, and impact on the ecosystem. From SeaWorld.org Animal Bytes.
- CyberZoo: Black Swan (Cygnus atratus)
- Gives general information, interesting facts, biome, diet, adaptations, diagram of food web, and environmental change.
- Enchanted Learning: Black Swan
- Printable coloring page accompanies location, names, anatomy, diet, eggs and nests information.
- Enchanted Learning: Trumpeter Swan
- Labeled coloring page shows flying and swimming swans. Details cover range, lifespan, names, anatomy, diet and feeding behavior, mating, and nests.
- Honolulu Zoo: Black Swan
- Presents physical characteristics, native distribution, molting, communication, flight, sounds, diet, reproduction, and growth.
- Mute Swan (Cygnus olor)
- University of Michigan Museum of Zoology reports introduced and native locations, common habitat, size, parenting, swimming behavior, noises, diet, ecosystem role, and conservation details.
- National Zoo: Trumpeter Swan
- Fact sheet contains physical description, sounds, location of main populations, summer and winter habitats, diet, mating habits, nests, young, threats, and restoration efforts.
- Trumpeter Swan (Cygnus buccinator)
- Details from TheBIGZoo cover images, taxonomy, length and weight, physical description, sounds, adaptations, molting, diet variety, predators, flocks, and mating.
- Tundra Swan (Cygnus columbianus)
- Cornell bird guide describes this all-white bird, including measurements, shape, similar species, various facts, range, habitat, diet, behavior, clutch size, and other names.
- Wildfacts: Mute Swan (Cygnus olor)
- BBC Nature looks at lifespan, physical statistics and description, locations, habitat, diet, behavior, reproduction, conservation status, and voice.
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