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The Indian grey hornbill is a medium-sized hornbill, measuring around 61 cm (24 in) in length. [3] The upper parts are greyish brown and there is a slight trace of a pale supercilium. The ear coverts are darker. The flight feathers of the wing are dark brown with a whitish tip. The tail has a white tip and a dark subterminal band.
[10] [11] The species may have occurred on Car Nicobar in the early 1900s. [12] A survey after the 2004 tsunami, however, indicated that the species had been extirpated on the islands of Trax and Megapode. [13] The eggs as well as adults are sought after by natives for food and birds may have been transported across islands.
They have brown-grey wings, a white carpal patch and black primary flight feathers tipped with white. The Indian grey hornbill, which is found mainly on the adjoining plains, is easily told apart by its prominent casque, and in flight by the white trailing edge of the entire wing. The Malabar grey hornbill has a grey back and a cinnamon vent.
The main difference in the structural characteristics of nest cavities between hornbill species is cavity size, which is highly correlated with body size. [12] Cavities preferred by the oriental pied hornbill are elongate and may be located at a height between 1–18 m or more. Cavity entrance shape is rounder than for other hornbills.
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 ...
The rufous-necked hornbill (Aceros nipalensis) is a species of hornbill in Bhutan, northeastern India, especially in Arunachal Pradesh, Indian Subcontinent and Southeast Asia. It is locally extinct in Nepal due to hunting and significant loss of habitat. [ 1 ]
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Recent genetic data show that ground hornbills and Bycanistes form a clade outside the rest of the hornbill lineage. [6] They are thought to represent an early African lineage, while the rest of Bucerotiformes evolved in Asia.