Hopping mouse
A hopping mouse is any of about ten different Australian native mice in the genus Notomys.They are rodents, not marsupials, and their ancestors are thought to have arrived from Asia about 5 million years ago.All are brown or fawn, fading to pale grey or white underneath, have very long tails and, as the common name implies, well-developed hind legs.Half of the hopping mouse species have become extinct since European colonisation.An Australian hopping mouse can concentrate urine to as high as 10,000 mOsm/L (10-20 times higher than a human).