- Animal Diversity Web Family Sphenodontidae (Tuataras)
- Discusses distinguishing characteristics, longevity, morphology, status and distribution.
- BBC.CO.UK Tuatara
- Discusses characteristics, habitat, behavior, diet and reproduction.
- Biological Diversity Rhynchocephalia
- Features taxonomy, distribution, morphology and conservation status.
- More Ancient Than the Dinosaurs - The Tuatara
- Describes appearance, behavior, phylogeny, status and habitat.
- Order Sphenodonta Rhynchocephalia
- Displays photos. With descriptions.
- Palaeos.com Rhynchocephalia
- Presents description and cladogram. With labeled illustration.
- Tuatara
- Contains data on anatomy, diet, predators, habitat, reproduction and classification. With pictures and links.
- Tuatara Sphenodon punctatus
- Describes characteristics, behavior, habitat, distribution and reproduction. With photos.
- Tuataras (Sphenodons)
- Provides data on suborders.
- Why Does the Tuatara Hunt?
- Describes behavior, appearance and length.
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