It was called by Buffon a "grossly monstrous" appendage. The bill is serrated and is the largest relative to body size of all birds providing 30 to 50% of its body surface area, although another Neotropical species, the sword-billed hummingbird, has a longer bill relative to its body length. It also has a rattling call and will bill-clack.
![toucan tropix 2 toucan tropix 2](https://www.nothingspecificimages.com/SIGN.WOOD.9X6/26ec6-Z001488/SIGN.WOOD.9X6.QQJQLJP00.Z001488-2.jpg)
Its voice consists of a deep, coarse croaking, often repeated every few seconds. Juveniles are duller and shorter-billed than adults. Other than the size difference, there are no external differences between the sexes. Body weight in these birds can vary from 500 to 876 g (1 lb 1 + 5⁄ 8 oz to 1 lb 14 + 7⁄ 8 oz), with males averaging 723 g (1 lb 9 + 1⁄ 2 oz) against the smaller female, which averages 576 g (1 lb 4 + 3⁄ 8 oz). This species is the largest toucan and the largest representative of the order Piciformes. The tongue is nearly as long as the bill and very flat. It looks heavy, but as in other toucans it is relatively light because the inside largely is hollow.
![toucan tropix 2 toucan tropix 2](https://m.media-amazon.com/images/I/71dYkIo+yHL._AC_SL1500_.jpg)
The most noticeable feature, however, is its huge bill, which measures from 15.8 to 23 cm ( 6 + 1⁄ 4 to 9 in) in length, which is yellow-orange, tending to deeper reddish-orange on its lower sections and culmen, and with a black base and large spot on the tip.
#TOUCAN TROPIX 2 SKIN#
This blue skin is surrounded by another ring of bare, orange skin. What appears to be a blue iris is actually thin blue skin around the eye. The toco toucan has conspicuously contrasting plumage with a mainly black body, a white throat, chest and uppertail- coverts, and red undertail-coverts. Found in eastern and southern Brazil, northern Bolivia, Paraguay and northern Argentina albogularis - Cabanis, 1862: Originally described as a separate species. toco - Statius Müller, 1776: Found in the Guianas, northern and north-eastern Brazil and south-eastern Peru German zoologist Philipp Ludwig Statius Müller described the toco toucan in 1776.