Tree Monitor, Khlong Saeng Wildlife Sanctuary, ThailandTree monitors are big lizards. Very big. I’d say this guy was somewhere between four and five feet long. He/she clung to that tree, not moving but keeping an eye on us as we slowly drifted by in a boat. Photographed in Khlong Saeng in Thailand. Nikon D500 with Nikkor 200-400mm lens (at 350mm) ISO 800, f/4 at 1/400th of a second.