Aulacorhynchus haematopygus

Aulacorhynchus haematopygus, also known as Crimper-Rumped toucanet, has two subspecies.

The upset-waisted toucan, whose song is usually a series of long, toneless guttering sounds, similar to the croaks of frogs and dogs, as well as dry clicks, is also the loudest of the forest birds. It lives in mountains from 1,000 to 3,600 meters above sea level and likes to live in treetops. When eating, always peck the food with the tip of the mouth first, then tilt the neck, throw the food upward, and then open the big mouth to accurately put the food into the throat, without having to go through the long mouth and spend time in the process of "swallowing". It is omnivorous and feeds on fruits, seeds and insects.

The upturned beak burrows into decayed trees and builds its nest high in a hollow. Both parents care for the chicks, but there is no clear responsibility for watching the chicks at night. Large droppings and residues will use the beak to peck out the nest, which is kept fairly tidy. They also sometimes raid the nests of young birds and eat the eggs and chicks. - Lay 2 to 4 eggs. Smooth white eggs are piled in unlined holes and hatch in about 16 days. The hatchlings are completely naked, take at least three weeks to open their eyes, and begin to live their lives about 45 days after hatching.

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It is found in South America (Colombia, Venezuela, Guyana, Suriname, Ecuador, Peru, Bolivia, Paraguay, Brazil, Chile, Argentina, Uruguay, and the Malvinas Islands (also known as the Falkland Islands).

The upset-waisted toucan resembles a hornbill. The body feathers are mainly green, the chest is bluish-green, the wings and back are dark, and the tail has a red spot. The beak is brown with black spots and a white stripe at the base. The beak is large but light, and although large, the beak of this bird weighs less than 30 grams. The structure of the mouth bone is very special, it is not a dense entity, the outside is a layer of crust, through the middle of extremely fine fibers, porous spongy tissue, filled with air, so that it does not feel heavy pressure.