" This is the actual black-browed babbler ( Malacocincla perspicillata) specimen found and stuffed by Carl A.L.M. Schwaner and studied by the nephew of Napoleon Bonaparte in 1850. HowStuffWorks/Naturalis Biodiversity Center/Wikimedia Commons (CC BY-SA 3.0) Some animals are very rare, it's true. However, it's unusual for an animal to be so rare that one European explorer finds it while cruising through Indonesia in the 1840s, and it isn't known again to science for another 170 years. That is an excessively rare animal, and the black-browed babbler ( Malacocincla perspicillata) is one of these. The black-browed babbler is a bird that lives exclusively on the island of Borneo. Part of the reason the bird was lost for so many decades is that the guy who caught, killed and stuffed the first specimen in the late 1840s, German naturalist Carl A.L.M. Schwaner, reported that he found the bird on the island of Java, one island to the south. But even after the mix-up was rectified, scientists didn't find the bird. They didn't look very hard, admittedly, but still — the bird was lost for 170 years.