This organism is an invasive species. They kill many of the now endangered species like the Nene in Hawaii. they do some good in the world by eating many poisonous snakes. They were brought into native countries because Hawaii needed some control of the rats eating the sugar cane fields but there was a catch, the rats come out at night to get food and sleep during the day, but mongooses have the opposite circadian rhythm, they sleep at night and come out of their burrows for the day.