Iguanas have keen vision and can see shapes, shadows, colours, and movement at long distances. Their visual acuity enables them to navigate through crowded forests. They employ visual signals to communicate with other members of the same species.

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The Blue Iguana (Cyclura Lewisi), also known as the Grand Cayman Ground Iguana, Grand Cayman Blue Iguana or Cayman Island Rock Iguana, is an endangered species of lizard which is endemic to the island of 

Grand Cayman.