I think it's an iguana in this photography took by Balaji Malliswamy and shared from his courtesy under CC0 license. If you like the lizard image download from here optimized for apply in desktop backgrounds, homescreen phones, blogs, apps, social media, web design projects...
Widescreen Desktop / Macbook (Retina): 2880x1800 (fits on: 2560x1600, 1920x1200, 1440x900)
Samsung Galaxy Tab & iPad: 2048x2048 (compatible with many tablets)
HTC, Samsung Galaxy & iPhone: 1080x1920 (compatible with many phones)