Island ecosystems are thought to be more vulnerable to invasive species - where they pose a greater threat of extinction to native animals and fauna. Getty Images The American bullfrog is known to ...

bugs and other animals, it is anything but. Berthelsdorf first spotted the brilliantly colored American bullfrog on his ...

Desert Tortoise - These tortoises can survive for over a year without water by storing it in their bodies. Scorpion - They can endure long periods without water, sometimes up to a year, by slowing ...