Fig. 23. A in A History Of Herpetology At The American Museum Of Natural History

Fig. 23. A portion of Mary Dickerson's Bullfrog Group in 1911. The techniques for this first major group became the basis for subsequent groups. Among the abundance of detail, ''Two frogs are engrossed in a chickadee on the birch branch above. The smaller frog seems likely to fall prey to a black snake ready to strike from the white azalea'' (Dickerson, 1911c). AMNH Photographic Archives 33561.