The Oahu Alauahio, is a small finch- like bird that is found on the island of Oahu. It is a brown yellow bird with a small bluish bill. It is four inches long and had a small tail made up of mustard colored feathers. It feed on invertebrates that were hidden under the bark of trees. It used the bill to remove the bark and the insects were eaten using a specialized tongue. The bird is critically endangered, most likely extinct because of disease (avian malaria), introduced and invasive plants and widlife, and loss of habitat. The last confirmed record occurred in 1985, with unconfirmed reports occasionally still reported.