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Toucans (/ ˈ t uː k æ n /, UK: /-k ə n /) are Neotropical birds in the family Ramphastidae. The Ramphastidae are most closely related to the Toucan barbets. They are brightly marked and have large, often colorful bills. The family includes five genera and over 40 different species. Toucans are arboreal and typically lay two to four white ...
The researchers also identified several families of transposable elements that were specific to toucans, indicating that these elements had played a role in the evolution of the toucan genome. In particular, the researchers identified a family of elements called CR1, which had undergone a burst of activity in the toucan genome. This burst of ...
The International Ornithologists' Union (IOU) recognises 43 species of toucans in five genera. [1] This list does not include hybrid species, extinct prehistoric species, or putative species not yet accepted by the IOU.
The toco toucan (Ramphastos toco) is a species of bird in the toucan family Ramphastidae. It is the largest species of toucan and has a distinctive appearance, with a black body, a white throat, chest and uppertail- coverts , and red undertail-coverts.
The toucan beak has a network of superficial blood vessels that support the rhamphotheca, the horny sheath of the bill. [7] The toucan is able to dilate or enlarge the beak's blood vessels when temperatures rise above a thermal neutral zone to allow for blood to pass readily into the beak, allowing for heat exchange and cooling.
The keel-billed toucan (Ramphastos sulfuratus), also known as sulfur-breasted toucan, keel toucan, or rainbow-billed toucan, is a colorful Latin American member of the toucan family. It is the national bird of Belize. [3] The species is found in tropical jungles from southern Mexico to Ecuador.
In the Neotropical realm, toucans occupy the hornbills' ecological niche, an example of convergent evolution. Despite their close appearances, the two groups are not very closely related, with toucans being allied with the woodpeckers , honeyguides and several families of barbet , while hornbills (and their close relatives the ground hornbills ...
They range in size from the rufous piculet at 8 centimetres in length, and weighing 7 grams, to the toco toucan, at 63 centimetres long, and weighing 680 grams. [1] All nest in cavities and have altricial young.