Smoky Jungle Frog, El Valle, PanamaSmoky jungle frogs are a common sight when hiking in tropical rainforests at night. They are very large frogs, about 7 inches long and very robust. They are strictly nocturnal and also have a noxious skin secretion. If picked up they make a high pitched scream (not that I recommend picking up a frog with noxious skin, or any frogs for that matter).
Nikon D810 with Nikkor 200-400mm lens (at 400mm) ISO 200, f/9 at 1/160th of a second, two Nikon SB-900 flash units