NATURAL SELECTION 



Figure 94. Aposematic Coloration in Amphibians. Natural colors are very striking 

 combinations of black, red, yellow, orange, and white. 



Bombinator igneus Dendrobates tinctorius 



Htjperolius marmoratus 

 Atelopus stelzneri Dendrobates tinctorius 



Salamandra maculosa 

 Phrynomerus bifasciatus Dendrobates tinctorius 



(From Cott, "Adaptive Coloration in Animals," Methuen & Co., Ltd., London, 1940.) 



Mimicry is widely scattered throughout the Animal Kingdom, but the 

 best known examples occur among the Lepidoptera. The monarch and 

 viceroy butterflies of this country are familiar examples, with the monarch 

 as the model and the viceroy the mimic (Figure 95). That mimicry is 

 effective among birds is shown by an experiment of Swynnerton. The 

 African drongos, Dicriiriis afer and D. ludwigi, are black all over, and are 

 impalatable. The flycatcher, Bradyomis ater, and the cuckoo-shrike, 



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