The dolphins were the animals more hunted in the antiquity to extract the oil that was in small amounts in a zone of its head, and that was used like lubricant for certain mechanisms of jewelry store.

At the present time have been alternative and cheaper sources for the obtaining of these oils, reason why the hunting of dolphins has disappeared protecting therefore the animals in its wild state.

The monsters of Gila are wild animals that bite their victim and they cling to her, rolling on the back so that the poison flows to the interior of the wound and chewing to inflict still greater wounds. The poison that these animals use mainly to defend themselves, is secreted by glands located in the inferior jaw and flows to the outside through present furrows in the teeth, attacking the nervous centers that control the heart; the mordedura of this wild animal can be dangerous the human being. The monsters of Gila eat small animals like rodents, ants and eggs of other wild reptiles of the desert. In captivity they have shown great liking by eggs of serpent and other species of wild lizards.

The varanos are wild animals that are between the oldest living lizards. They are related with mosasaurio, a marine lizard that lived 136 million ago years to makes 65 million years, that got to measure up to 10 ms of length. The most well-known varano and of greater size, the dragoon of Komodo, this animal in wild state reaches the 3 ms of length and is a protected species. These animals live in several islands, like the one of Komodo, in Indonesia. It is a ferocious rotten predator and that takes in the mouth virulent bacteria, reason why its bite can be fatal. The varanos live in tropical and desert areas on all Africa; in Asia, from Arabia to the south of China and Malaysia, and also in the Southeastern of Asia.