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THE METHODS BY WHICH CONCEALMENT
VARIABLE COLOUR RESEMBLANCE
THE PRINCIPLE OF CONCEALMENT BY COUNTERSHADING
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adaptive animals aposematic appearance associated attack attention attitude background become bees belonging birds body brown butterflies caterpillars certain closely colour combined concealment considered conspicuous contrast cryptic dark deceptive depends described developed device directed display disruptive effect eggs enemies environment evidence example exhibited experiments fact feeding field fishes frequently frogs function further green ground habits hand head highly illustrated important individuals insects instance interesting kind known larvæ later leaf leaves less light living lizards London markings means method mimicry moths movements nature nest Notes objects observed occur particular pattern predators present prey principle produced protective referred relation relatively remarkable resemblance rest says seen selection shade side significant similar snakes species spider striking structure surface surroundings toads tone tree various warning widely wings yellow young