RALPH LEE HOPKINS / SCIENCE PHOTO LIBRARY RALPH LEE HOPKINS / SCIENCE PHOTO LIBRARY
Courtship display by a green iguana (Iguana iguana) found along the Sarapiqui River, La Selva Biological Station, Costa Rica. The green iguana inhabits Central and South America, and grows to a length of about 4-6 feet. Males have a flap of skin called a dewlap that can be raised to attract females or look bigger and deter predators.
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