Hoatzins

A pair of hoatzins (Opisthocomus hoazin) rest in a tree. The only species in its family, the hoatzin resembles the prehistoric archaeopteryx as much as any living species. It is the world's only totally herbivorous bird and has a stomach system resembling a cows and full of bacteria to break down the celulose in the leaves it eats. This extra weight makes it an extremely clumsy flier and means it gives off an unpleasant odour!
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Amazon3556522
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