San Esteban Island chuckwalla  (Sauromalus varius)

Close up of a San Esteban Island chuckwalla

This plump lizard can grow up to 60 centimetres, making it by far the largest of the chuckwallas (Sauromalus), and similar in size to its large iguana relatives. This is a prime example of ‘insular gigantism’, the tendency of small mainland animals

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Species related by

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