Breakthroughs, discoveries, and DIY tips sent every weekday. When you think of koalas (Phascolarctos cinereus), chances are that words like cute or fluffy come to mind--not cryptic or stealthy. And yet, researchers in southeastern Australia have just discovered hundreds of previously undocumented koalas living surprisingly close to the city of Newcastle. The team conducted what they claim to be the largest and most accurate peer-reviewed koala survey to date. As detailed in a study published this month in the journal Biological Conversation, the survey estimates that a population of 4,357 koalas across 166,302 acres of land is living in the state of New South Wales.