The helmeted hornbill is a very large bird in the hornbill family. It is found on the Malay peninsula, Sumatra and Borneo. It has mostly blackish plumage, except that the belly and legs are white and the tail is white with a black band near the tip of each feather. The tail is long and the two central tail feathers are much longer than the others, giving the bird a total length greater than that of any other hornbill species. The body length is 110 to 120 cm, not counting the tail feathers, which boost the length a further 50 cm. Males average 3.1 kg in weight and females about 2.7 kg. Although sometimes considered the largest Asian hornbill, they weigh a bit less than the great hornbill (and considerably less than the African ground hornbills). This species has a bare, wrinkled throat patch, blue in females and red in males. The casque goes from the base of the bill halfway to the tip, where it ends abruptly. It and the bill are yellow; the red secretion of the preen gland covers the sides and top of the casque and the base of the bill, but often leaves the front end of the casque and the distal half of the bill yellow. Source
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