3712896 A South American Horned Frog sitting on a rock showing its defensive pose, London Zoo, August 1928 (b/w photo) by Bond, Frederick William (1887-1942); Zoological Society of London; (add.info.: The frog inflates its body with air thus intimidating predators by presenting a large image or physically preventing their predators from swallowing them.); by Zoological Society of London ; British, out of copyright.