Keel-billed toucan: Difference between revisions
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=== Food and feeding === |
=== Food and feeding === |
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[[File:Ramphastos sulfuratus -London Zoo-4c.jpg|thumb|right|At [[London Zoo]]]] |
[[File:Ramphastos sulfuratus -London Zoo-4c.jpg|thumb|right|At [[London Zoo]]]] |
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[[File:Keel-billed toucan.ogg|thumb|A keel-billed Toucan at the Roatan Butterfly Garden, [[Roatan]], Honduras, apparently annoyed at being stared at by tourists.]] |
[[File:Keel-billed toucan.ogg|thumb|A keel-billed Toucan at the Roatan Butterfly Garden, [[Roatan]], Honduras, apparently annoyed at being stared at by tourists.]] The keel-billed toucan is know to glow in the dark and also know to eat peoples eyes. It is also know to be very pissed off in the day time. |
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The diet of Keel-billed Toucans consists mostly of a wide range of [[fruit]],<ref>E.g. ''[[Cymbopetalum mayanum]]'' ([[Annonaceae]]) and [[Gumbo-limbo]] (''Bursera simaruba''): Van Tyne (1929), Foster (2007).</ref> but may also include small birds, eggs, [[insects]] and reptiles. The bill, surprisingly dexterous, allows this toucan to utilize a large variety of fruit that might not otherwise be reached. When eating the fruit,it uses its bill to dissect the fruit, and then tosses its head back to swallow the fruit whole. |
The diet of Keel-billed Toucans consists mostly of a wide range of [[fruit]],<ref>E.g. ''[[Cymbopetalum mayanum]]'' ([[Annonaceae]]) and [[Gumbo-limbo]] (''Bursera simaruba''): Van Tyne (1929), Foster (2007).</ref> but may also include small birds, eggs, [[insects]] and reptiles. The bill, surprisingly dexterous, allows this toucan to utilize a large variety of fruit that might not otherwise be reached. When eating the fruit,it uses its bill to dissect the fruit, and then tosses its head back to swallow the fruit whole. |
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Revision as of 15:47, 7 May 2010
| Keel-billed Toucan | |
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| At Macaw Mountain Bird Park, Honduras | |
| Scientific classification | |
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| Species: | R. sulfuratus
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| Binomial name | |
| Ramphastos sulfuratus Lesson, 1830
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The Keel-billed Toucan (Ramphastos sulfuratus), also known as Sulfur-breasted Toucan, Rainbow-billed Toucan, is a colorful Latin American bird with a large bill. It is the national bird of Belize.[1]
Description
Including its bill, the Keel-billed Toucans ranges in length from around 17 to 22 inches (42–55 cm).[2] Their large and colorful bill averages around 5-6 in (12–15 cm), about one-third of its length. While the bill seems large and cumbersome, it is in fact a spongy, hollow bone covered in keratin, a very light and hard protein.
The plumage of the Keel-billed Toucan is mainly black with a yellow neck and chest. Molting occurs once per year.[3] It has blue feet and red feathers at the tip of its tail. The bill is mainly green with a red tip and orange sides.
Keel-billed Toucans have zygodactyl feet, or feet with toes facing in different directions. In the case of the Keel Billed Toucan, it has two toes facing forward and two facing back. Because the Toucans spend a large portion of time in the trees, this helps for the birds to stay on the branches of the trees and hop from one to another.
Distribution and ecology
The Keel-billed Toucan can be found from Southern Mexico to Venezuela and Colombia. It roosts in the canopies of tropical, subtropical, and lowland rainforests, up to altitudes of 1,900 m.[4] It roosts in holes in trees,[3] often with several other toucans. This can be very cramped, so the birds tuck their tails and beaks under their bodies to conserve space while sleeping. Adding to the lack of space, the bottoms of the holes are often covered with pits from the fruit the toucans have eaten.[3]
Like many toucans, Keel-billed is a very social bird, rarely seen alone. It travels in small flocks of approximately six to thirty individuals through lowland rainforests; it is a poor flyer, and moves mostly by hopping through trees. It has a family structure within the group. Birds will often "duel" with each other using their bills, and throw fruit into each other's mouths. Keel-billed Toucans live together in these groups, often sharing cramped living quarters of holes in trees. Able to utilize human-altered habitat to some extent,[5] this widespread bird is considered to be a Species of Least Concern by the IUCN.[6]
Behaviour
Food and feeding
The keel-billed toucan is know to glow in the dark and also know to eat peoples eyes. It is also know to be very pissed off in the day time.
The diet of Keel-billed Toucans consists mostly of a wide range of fruit,[7] but may also include small birds, eggs, insects and reptiles. The bill, surprisingly dexterous, allows this toucan to utilize a large variety of fruit that might not otherwise be reached. When eating the fruit,it uses its bill to dissect the fruit, and then tosses its head back to swallow the fruit whole.
Breeding
The female Keel-billed Toucan will lay a clutch of two to four (rarely one) white eggs in a natural or already-made tree cavity.[8] The male and female share in the caring of the eggs, both taking turns incubating.[3] The eggs hatch approximately 15–20 days after being laid. After hatching, the male and female again take turns feeding the chicks. When the chicks hatch, they have no feathers, and have their eyes closed for approximately 3 weeks. The chicks have adequately formed heel pads, which assist on the pit-covered bottom of the nest.[3] The chicks stay in their nest for approximately eight to nine weeks while their bills develop fully and they are ready to fledge from the nest.
Aviculture
The Keel-billed Toucan is sometimes kept in captivity, but has a high fruit diet and is sensitive to hemochromatosis (an iron storage disease).[citation needed]
Footnotes
- ^ Government of Belize: About Belize - National Symbols. Retrieved 2007-02-08.
- ^ Skutch (1971)
- ^ a b c d e Van Tyne (1929)
- ^ Strewe & Navarro (2004)
- ^ Foster (2007)
- ^ Template:IUCN2006
- ^ E.g. Cymbopetalum mayanum (Annonaceae) and Gumbo-limbo (Bursera simaruba): Van Tyne (1929), Foster (2007).
- ^ http://www.saczoo.com/Document.Doc?id=112
References
- Foster, Mercedes S. (2007): The potential of fruiting trees to enhance converted habitats for migrating birds in southern Mexico. Bird Conservation International 17(1): 45-61. doi:10.1017/S0959270906000554 PDF fulltext
- Skutch, Alexander F. (1971): Life History of the Keel-billed Toucan. Auk 88(2): 381-396. PDF fulltext
- Strewe, Ralf & Navarro, Cristobal (2004): New and noteworthy records of birds from the Sierra Nevada de Santa Marta region, north-eastern Colombia. Bull. B.O.C. 124(1): 38-51. PDF fulltext
- Van Tyne, Josselyn (1929): The Life History of the Toucan, Ramphastos brevicarinatus. University of Michigan Museum of Zoology Miscellaneous Publications 19: 1-43.
External links
- Extensive Gallery on Toucans
- Save the Endangered Species Act
- The Rainforest Site
- Race for the Rainforest
- Ramphastos sulfuratus-"Rainbow-billed Toucan" videos on the Internet Bird Collection
- Stamps (7 countries)
- Keel-billed Toucan photo gallery VIREO Photo-High Res
- Bibliography of online, ornithological articles which explore the natural history of the Rainbow or Keel-billed toucan, Ramphastos sulfuratus sulfuratus.