Yellow-casqued hornbill: Difference between revisions
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| name = Yellow-casqued |
| name = Yellow-casqued hornbill |
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| image = Ceratogymna elata -Hong Kong Zoo-8a.jpg |
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The ''' |
The '''yellow-casqued hornbill''' (''Ceratogymna elata''), also known as the '''yellow-casqued wattled hornbill''', is found in the [[rainforest]] of coastal regions of [[West Africa]], for example in [[Côte d'Ivoire]]. |
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The yellow-casqued hornbill is one of the largest birds of the West African forest, with adults weighing up to {{Convert|2|kg|abbr=on}}. They live mainly in the forest canopy, rarely feeding on the ground. They live in small family groups containing at least one adult male and female, with one or two immature birds, though they sometimes gather in larger flocks to exploit a major food supply such as an ant or termite nest. |
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The birds are occasionally preyed upon by [[ |
The birds are occasionally preyed upon by [[crowned hawk-eagle]]s, and they respond to the presence of an eagle (sometimes indicated by its characteristic shriek) by mobbing – approaching it and emitting calls. Since the eagles depend on surprise to make a catch, this frequently causes them to leave the area. Recent research (Rainey et al., 2004) has shown that the birds respond in the same way to the [[alarm call]]s that [[Diana monkey]]s, which live in the same areas, emit if they notice an eagle, and that they can distinguish the calls made by the monkeys in the presence of eagles from those they make in the presence of [[leopard]]s, which prey on the monkeys but not on the hornbills. |
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Biologist [[Olivia Judson]] has remarked that "Yellow-casqued hornbills remind me of aging rock stars: their head feathers have that kind of wild look." <ref>[http://opinionator.blogs.nytimes.com/2009/10/06/leopard-behind-you/ ‘Leopard Behind You!’] by Olivia Judson, NY Times, October 6, 2009. She also comments on hornbill reactions to alarm calls in this article.</ref> |
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==References== |
==References== |
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Revision as of 19:54, 24 May 2014
| Yellow-casqued hornbill | |
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| At Hong Kong Zoological and Botanical Gardens | |
| Scientific classification | |
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| Species: | C. elata
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| Binomial name | |
| Ceratogymna elata (Temminck, 1831)
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The yellow-casqued hornbill (Ceratogymna elata), also known as the yellow-casqued wattled hornbill, is found in the rainforest of coastal regions of West Africa, for example in Côte d'Ivoire.
The yellow-casqued hornbill is one of the largest birds of the West African forest, with adults weighing up to 2 kg (4.4 lb). They live mainly in the forest canopy, rarely feeding on the ground. They live in small family groups containing at least one adult male and female, with one or two immature birds, though they sometimes gather in larger flocks to exploit a major food supply such as an ant or termite nest.
The birds are occasionally preyed upon by crowned hawk-eagles, and they respond to the presence of an eagle (sometimes indicated by its characteristic shriek) by mobbing – approaching it and emitting calls. Since the eagles depend on surprise to make a catch, this frequently causes them to leave the area. Recent research (Rainey et al., 2004) has shown that the birds respond in the same way to the alarm calls that Diana monkeys, which live in the same areas, emit if they notice an eagle, and that they can distinguish the calls made by the monkeys in the presence of eagles from those they make in the presence of leopards, which prey on the monkeys but not on the hornbills.
References
- Rainey, H. J., Zuberbühler, K., & Slater, P. J. B. (2004). Hornbills can distinguish between primate alarm calls. Proceedings of the Royal Society of London Series B, 271, 755-759.