This is a beautifully detailed engraving of the Argentine Horned Frog which is 'remarkable for their large size and brilliant coloration, as well as for the enormous dimensions of their mouths and their fierce and carnivorous habits. These frogs, or escuerzos, as they are locally called, are abundant in many parts of Argentina, and in damp weather may be met with crawling about among the grass in numbers, after the manner of toads. They are exceedingly bold and ferocious, flying fiercely at anyone who attacks them and maintaining their hold with the tenacity of a bulldog, at the same time uttering a kind of barking cry. On other occasions they give bent to a peculiarly deep bell-like note.