- AmphibiaWeb: Cryptobranchus alleganiensis
- Gives common names, status, and various details including population, life history, description, and locations.
- Cryptobranchus alleganiensis -- Hellbender
- Furnishes picture, map, key characters, similar species, description, habitat, natural history, and status.
- Eastern Hellbender (Cryptobranchus alleganiensis alleganiensis)
- Reviews characteristics, distribution, food, images, and map.
- Hellbender (Cryptobranchus alleganiensis alleganiensis)
- Offers identification tips, distribution, status, ecology, threats, and management issues.
- Hellbender (Cryptobranchus alleganiensis)
- Gives description, range, diet, habitat, behavior, breeding, conservation status, and images.
- Hellbenders.org
- Covers appearance, habitat, locations, myths and misunderstandings, conservation, images, videos, and research.
- Ozark Hellbender (Cryptobranchus alleganiensis bishopi)
- U.S. Fish and Wildlife provides listing status, general information, and candidate documents.
- Ozark Hellbender (Cryptobranchus alleganiensis bishopi)
- Addresses characteristics, distribution, management issues, status, ecology, threats, and references.
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