Mr.Justice Newton, who assiduously collected and took notes upon the Lepidoptera of Bombay, informed Mr.
Butler of the British Museum that the large and swift-flying butterfly Charaxes psaphon, was continually persecuted by the bulbul, so that he rarely caught a specimen of this species which had not a piece snipped out of the hind wings.

He offered one to a bulbul which he had in a cage, and it was greedily devoured, whilst it was only by repeated persecution that he succeeded in inducing the bird to touch a Danais.[92] Besides these three families of butterflies, there are certain groups of the great genus Papilio--the true swallow-tailed butterflies--which have all the characteristics of uneatable insects.

They have a special coloration, usually red and black (at least in the females), they fly slowly, they are very abundant, and they possess a peculiar odour somewhat like that of the Heliconidae.

One of these groups is common in tropical America, another in tropical Asia, and it is curious that, although not very closely allied, they have each the same red and black colours, and are very distinct from all the other butterflies of their respective countries.

There is reason to believe also that many of the brilliantly coloured and weak-flying diurnal moths, like the fine tropical Agaristidae and burnet-moths, are similarly protected, and that their conspicuous colours serve as a warning of inedibility.