Short-Beaked Echidna, Tasmania, AustraliaThere are four species of echidna. This is the short-beaked, which can be found throughout Australia and portions of New Guinea. It’s the most widespread native mammal in Australia. Unlike many other Australian mammals which are marsupials, the short-beaked echidna is a monotreme. Monotremes are one of the three main groups of mammals on earth, along with placentals and marsupials. But there are only five living species of monotreme — the four echidnas and the platypus. Their distinguishing characteristic is that they lay eggs. I photographed this echidna somewhere in central Tasmania. Nikon D810 with Nikkor 200-400mm lens (at 200mm) ISO 800, f/4 at 1/160th of a second.