There's one more intriguing secret contained in the remains: proteinaceous material.

蛋白质物质。

It's thought that they may have evolved such an excruciating defense because they forage in rainforest canopies loaded with predators looking for proteinaceous snacks.

认为，它可已经进化出大的防御力，因为它在充满捕食者的热带雨林树冠中觅食，寻找蛋白质类零食。