- America Zoo: Three-toed Sloth - Bradypus tridactylus
- Furnishes status, meaning of name, classification, physical appearance, reproduction, location, habitat, diet, and behavior.
- Animal Info - Maned Three-toed Sloth
- Reviews other names, picture links, overview, trivia, IUCN status, population trends, biology, ecology, diet, behavior, and social structure.
- Maned Three-toed Sloth (Bradypus torquatus)
- Information looks at physical appearance, classification, status, conservation, threats, range, habitat, related species, diet, and behavior.
- Maned Three-toed Sloth (Bradypus torquatus)
- Describes range, habitat, physical features, reproduction, key behaviors, food habits, and other comments. From University of Michigan Museum of Zoology.
- Pale-throated Three-toed Sloth (Bradypus tridactylus)
- Animal Diversity Web includes pictures, geographic regions, biomes, characteristics, diet, reproduction, behavior, and conservation status.
- Pale-throated Three-toed Sloth (Bradypus tridactylus)
- Wildfacts from BBC Nature offers lifespan, images, statistics, appearance, locations, habitat, diet, behavior, and reproduction.
- Pygmy Three-toed Sloth (Bradypus pygmaeus)
- ARKive.org furnishes facts, status, related species, images, videos, appearance, range and habitat, biology, threats, and conservation.
- Three-Toed Tree Sloths: Bradypodidae
- Combines species account with general information, including range, habitat, diet, physical characteristics, behavior, and reproduction.
- WAZA: Brown-throated Three-toed Sloth (Bradypus variegatus)
- Sheet from Virtual Zoo describes appearance, locations, habitat, diet, other names, CITES status, behavior, and young. Includes images and range map.
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