This small bird native to Hawaii was one species of several other ‘o’o birds that preceded it into extinction. It was said to officially have disappeared as late as 1987, when its distinctive flute-like call was last heard. It was small and rather demure in color, being only brown or black. The extinction of the Kauai ‘O’o is blamed mostly on humans inhabiting the Hawaiian Islands and damaging habitats as well as the introduction of non-native species. Before being declared extinct, they were extremely rare for the duration of the 1900s and were mostly only identified by their distinctive call.