Yellow-Crowned Brush-Tailed Rat, Loreto, PeruWhen my guide stopped the boat because he saw a rat, I wasn’t exactly enthusiastic. Then I saw this guy staring back at me and I had one of my favorite sightings from my week in the Peruvian Amazon. Not just any ordinary rat, but the yellow-crowned brush-tailed rat. So cool it gets two hyphens in its name. These guys tend to live in tree cavities, usually palms along the banks of rivers. Nikon D500 with Nikkor 500mm PF lens, ISO 800, f/5.6 at 1/125th of a second, Godox V860iii flash with Better Beamer extender.