Green Iguanas have a white photosensory organ on the top of their heads called the parietal eye (Third eye, pineal eye or pineal gland), most other species of lizards have lost this.. This “eye” is not like a normal eye as it only has a rudimentary retina and lens and can’t form images. But is sensitive to light and dark and movement. Which helps the iguana when being stalked by predators from above.

Taken 2/22/12 at St. Louis Iguana Society

This is our newest addition at St. Louis Iguana Society his name is Mufasa and is a TRUE red Iguana! We brought him home from the Missouri Reptile expo along with a juvenile green iggy, 2 Whites tree frogs and an albino corn snake.

Taken 2/19/12

This is our newest addition at St. Louis Iguana Society his name is Mufasa and is a TRUE red Iguana! We brought him home from the Missouri Reptile expo along with a juvenile green iggy, 2 Whites tree frogs and an albino corn snake.

Taken 2/19/12

American alligator at the Missouri Reptile Expo

American alligator at the Missouri Reptile Expo

My girlfriend was in the second page of The St. Louis Post Dispatch with her new iggy Mufasa!

Emily Mathews of St. Louis gets acquainted with a red iguana before buying it at the Gateway Reptile Expo on Sunday, Feb. 19, 2012. 

Photo by: Christian Gooden, cgooden@post-dispatch.com

My girlfriend was in the second page of The St. Louis Post Dispatch with her new iggy Mufasa!

Emily Mathews of St. Louis gets acquainted with a red iguana before buying it at the Gateway Reptile Expo on Sunday, Feb. 19, 2012.

Photo by: Christian Gooden, cgooden@post-dispatch.com

Caiman Lizard (Dracaena guianesis) at the Missouri Reptile Expo.

Found in: South America, Amazon Basin of Peru and Brazil
Habitat: Aquatic and terrestrial

Taken at the Missouri Reptile Expo 2/19/12

Caiman Lizard (Dracaena guianesis) at the Missouri Reptile Expo.

Found in: South America, Amazon Basin of Peru and Brazil
Habitat: Aquatic and terrestrial

Taken at the Missouri Reptile Expo 2/19/12

A Desert Iguana (Dipsosaurus dorsalis) up for adoption at the St. Louis Iguana Society

One of the most common lizards of the Sonoran and Mojave deserts of the southwestern United States and northwestern Mexico.

A Desert Iguana (Dipsosaurus dorsalis) up for adoption at the St. Louis Iguana Society

One of the most common lizards of the Sonoran and Mojave deserts of the southwestern United States and northwestern Mexico.

Quasimodo, a green iguana, who was recently adopted from the St. Louis Iguana Society by a member of the Truman State Herpetology Lab

Quasimodo, a green iguana, who was recently adopted from the St. Louis Iguana Society by a member of the Truman State Herpetology Lab