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The smallest species is the black dwarf hornbill (Tockus hartlaubi), at 99.1 g (3.50 oz) and 32 cm (1 ft 1 in) in length. [ 3 ] [ 4 ] The largest and most massive species appears to be the southern ground hornbill which has an average weight of 3.77 kg (8.3 lb), and can weigh up to 6.3 kg (14 lb) and span about 180 cm (5 ft 11 in) across the wings.
It is the heaviest, but not the longest, Asian hornbill. [9] [10] With the separation of the ground hornbills into a separate family, Bucorvidae, the great hornbill reigns as the heaviest of all typical hornbills. [9] [11] Females are smaller than males and have bluish-white instead of red eyes, although the orbital skin is pinkish. Like other ...
Knobbed hornbill Sulawesi, Buton, Lembeh, Togian and Muna Island. An undescribed extinct hornbill species from Lifou in the Loyalty Islands , living until at least some 30,000 years ago, was initially placed in Aceros , but its biogeography places it with the species now in Rhyticeros (Steadman, 2006).
A male wreathed hornbill was fitted with a GPS tracking unit in Pakke Tiger Reserve during the breeding season; it moved a mean minimum daily distance of 24.8 km (15.4 mi) and dispersed seeds for up to 10.8 km (6.7 mi) from its nesting site. [21] Home ranges of the wreathed hornbill and other hornbill species overlap in several range countries.
Hornbills in the genus Buceros include some of the largest arboreal hornbills in the world, with the largest being the great hornbill.All the hornbills in this genus have a large and hollow bony casque on their upper beak that can be useful to scientists and bird watchers to recognise their age, sex and species.
Close-Up of Southern Ground Hornbill. This is a large bird, at 90 to 129 cm (2 ft 11 in to 4 ft 3 in) long. Females weigh 2.2 to 4.6 kilograms (4.9 to 10.1 lb), while the larger males weigh 3.5 to 6.2 kilograms (7.7 to 13.7 lb).
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It is a medium-sized bird, 50–54 centimetres (20–21 in) in length, and is characterized by its white belly and black back and wings. The tips of the long tail feathers are white.