This is Eco, an Iberian lynx cub at a breeding centre in Spain. His kind is the most endangered species of cat in the world. Eco has to be kept away from his twin brother, as an Iberian lynx cub is likely to kill its littermate, to ensure its own survival. This behaviour occurs when the cubs are between 30 and 60 days old and it makes the conservation of the species even more difficult. (The Loneliest Animals - PBS Nature)