The pygmy three-toed sloth is a teeny tiny sloth found only on the Escudo de Veraguas island, panama. Unless something drastic happens, we'll almost certainly lose this guys very soon as a 2012 survey found that there were fewer than 80 left on the island. Although the island has no human inhabitants, the gradual loss of the thick mangroves they inhabit, coupled with the alleged occasional poaching, is threatening the already tiny population. 2016 could be the year we wave goodbye to these docile little dudes. They also happen to be a certain science writer's favourite animal, so let's save the sloths.
