Mexico. Elephant Oak Chestnut Elephant is a kind of elephant insect, which is an insect in Fabres's Insect Story. It mainly feeds on oak chestnuts and comes from Mexico. Elephant oak chestnuts The elephant's mouth is very long, as thin as a horse's mane, reddish brown, almost straight and extremely long. Jaw is a high-strength dental nail with two diamond tips. Perched in oak chestnuts. I like green oak, pubescent oak and rouge oak. I like green oak best, followed by pubescent oak.