Yacaré Caiman, Pantanal, BrazilSometimes called the southern spectacled caiman, these crocodilians are endemic to Argentina, Bolivia, Brazil and Paraguay. I photographed this one in the Pantanal of Brazil where some 10 million live, up considerably since the 1980s when they were hunted for their leather. Nikon D300 with Nikkor 200-400mm lens. (at 350mm) ISO 400, f/4 at 1/500th of a second.