The Hawaiian Hawk or 'Io, Buteo solitarius, is a raptor of the Buteo genus enemic to Hawai'i. Buteos tend to be easily recognized by their bulky bodies relative to their overall length and wingspan. The 'Io is the only hawk that is native to Hawaii, where they are only known to breed on the Big Island in stands of native `ohi'a lehua trees. The species is protected as Endangered in the United States. However, the IUCN classifies the species as Near Threatened.