Birds are vertebrates, with a backbone and skeleton, although some of the bones are hollow to keep the bird light and aloft. Their forelimbs have the same bones as the human arm, but they are highly modified to form the structure for wings. Some of the bones in the wrist and fingers are fused together for extra strength.
Pueo are easily distinguished from the introduced Barn Owl by their piercing yellow eyes and the mottled brown patterns across their head, wings, back and chest, as well as the white ring that frames their face.
’Io prefer to hunt from tall perches that they use to survey their prey; however, they are known to dive at targets from mid-flight if the opportunity presents itself. are territorial and come together only to breed.