Animated Family Film 'Rango' Features Talking Animals in Western ...

Rango is a 2011 American computer-animated Western comedy film directed by Gore Verbinski from a screenplay by John Logan. The film became famous worldwide as it takes attention of the viewers as they give time to it. "Rango" is a splendid and great-looking entertainment with a strong story.
Here, The Chameleon has been used as "Rango", who is the main character of the film. 

FACTS ABOUT CHAMELEON IN CASE YOU DON`T KNOW
Chameleons or chamaeleons, are a distinctive and highly specialized clade of Old World lizards with over 200 species. These species come in a range of colors, and many species have the ability to change color. 
Classified as "old world" lizards because they're only indigenous to Africa and Eurasia, though they are currently introduced to other places in the world.
Chameleons' eyes are independently mobile, but in aiming at a prey item, they focus forward in coordination, affording the animal stereoscopic vision. They have a long sticky tongue whose length is 2 times the length of their body.The name chameleon means Earth lion and comes from the Greek words “chamai” (on the ground, on the Earth) and “leon” (lion).