Male and female tuatara
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Male and female tuatara
These tuatara were photographed on Stephens Island, Cook Strait, in 1972. The male (left) has a more prominent crest of spines along its back, neck and tail, and is larger than the female. Adult males typically weigh about 700 grams, and females 450 grams.
Whai muri
Department of Conservation
Reference: 10036438
Photograph by J. L. Kendrick
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