IUCN threat status:

Least Concern (LC)

Morphology

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Adult Hoatzins are approximately 24 to 26 inches in length. They have blue skin covering their faces and their eyes are red. The outer feathers are primarily chestnut-brown and the long tail is bronze-green and ends in a white band. The heads of Hoatzins are topped with a crest of reddish-brown feathers. The young are born without feathers but develop a layer of black down shortly after birth. A distinguishing feature of young Hoatzins are the pair of functional wing claws which are found on the ends of their wings on the first and second fingers. This feature is lost when the bird matures into an adult (De Schauensee, 1964, Grahm, 1990, Strahl and Grajal, 1991, Zahler, 1997).

Other Physical Features: endothermic ; bilateral symmetry

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Source: Animal Diversity Web

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