Blue Iguana
Cyclura lewisi

f5.6 @ 1/800s, ISO:1600, Nikon D3S w 500mm

"Blue Iguana," Wikipedia, the free encyclopedia. The male is larger than the female by one third of his body size. The mature male's skin color ranges from dark grey to turquoise blue, whereas the female is more olive green to pale blue.
Queen Elizabeth II Botanical Park, Grand Cayman, British West Indies, Caribbean