Complex sentence: It is listed as critically endangered by IUCN and was even feared extinct, but was finally rediscovered during surveys on Peleng Island by Indonesian ornithologist Mochamad Indrawan in 2007 and 2008.
Split into simpler sentences: It is listed as critically endangered by IUCN. It was feared extinct, but was finally rediscovered during surveys on Peleng Island by Indonesian ornithologist Mochamad Indrawan in 2007 and 2008.