Aelian records the following tale of an elephant fighting a dragon:
In India, I am told, the Elephant and the Drakon (Dragon-Serpent) are the bitterest enemies. Now Elephants draw down the branches of trees and feed upon them. And the Drakones, knowing this, crawl up the trees and envelop the lower half of their bodies in the foliage, but the upper portion extending to the head they allow to hang loose like a rope. And the Elephant approaches to pluck the twigs, whereat the Drakon springs at its eyes and gouges them out. Next the Drakon winds round the Elephant's neck, and as it clings to the tree with the lower part of its body, it tightens its hold with the upper part and strangles the Elephant with an unusual and singular noose.
Source: Aelian, On Animals, Book 6. Translated by Scholfield, A. F.
Does the story appear in Indian sources? Do we know the reason for the animosity between the two beasts?