Kauaʻi ʻōʻō
…were known to sing. The bird was a cavity nester in the thickly forested canyons of Kauaʻi. All of its relatives have also become extinct, such as the Hawaiʻi ʻōʻō, Bishop's ʻōʻō, and Oʻahu ʻōʻō. Relatively little is known about these extinct birds. The species became extinct from a large range of problems, including…