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Black-mandibled Toucan Images
The Black-mandibled Toucan (Ramphastos ambiguus) is a large toucan from northern South America. Its distribution ranges along the eastern slope of the Andes from Peru, north through Ecuador and Colombia, to Venezuela as far as the coastal ranges. It lives at altitudes of 1002400 m. in humid montane forests, with a preference for the canopy and edge. It generally occurs at higher elevations (generally above 1000 m) than other Ramphastos toucans and competes directly with the similarly-sized White-throated Toucan where they overlap. Black-mandibleds are most common in areas where White-throateds are rare, and vica versa. The Black-mandibled Toucan at one time was considered closely related to the Choco Toucan but is only distantly related per genetics. However, it is considered very closely related to the Chestnut-mandibled Toucan and the two are sometimes considered conspecific. The Black-mandibled and Chestnut-mandibled do not overlap in the wild and are found to differ 1.35% in mitochondrial DNA. This species has a total length of 4761 cm (1924 in) and weighs from . Among all toucans and living members of the Piciformes order, only the Toco Toucan and the White-throated Toucan average larger than the similarly-sized Black-mandibled and Chestnut-mandibled races. Among standard measurements, the short wing chord is , the huge bill is , the tail is , and the tarsus is . Little to nothing is known about the Black-mandibled Toucan's behavior or life history but it is generally predicted to mirror that of the Chestnut-mandibled Toucan.