About Buteo solitarius Peale, 1848
The Hawaiian hawk, scientifically named Buteo solitarius Peale, 1848, measures approximately 40 to 46 centimetres (16 to 18 inches) in length. Females are larger than males, with an average weight of 605 g (21.3 oz), while males have an average weight of 441 g (15.6 oz). This species has two distinct color phases: the dark phase features dark brown coloring on the head, breast, and underwings, and the light phase has a dark head paired with a light breast and light underwings. In adult individuals, the feet and legs are yellowish; juveniles have greenish feet and legs. During breeding season, one member of a mated pair (likely the female) develops a distinctive yellow patch (called a forecap) just above the upper mandible.
