Hoatzin

The Hoatzin is among the strangest-looking birds in the world because it appears to have been put together from leftover parts of half a dozen different bird species. It is an unruly collection of hues and patterns that may be found in the depths of the Amazon, along with talons that protrude from their front limbs. But there's no need to be alarmed if that sounds frightening. The Hoatzin is a very ungainly bird because of its haphazard combination of traits.

Despite having the ability to fly, the Hoatzin has poor air performance, hence the greatest escape method they have found for their young is to roll out of the nest and into the water when a predator approaches. The stink of this incredibly strange bird, though, is what stands out the most. It has acquired the nickname "Stinkbird" due to its distinctive manure-like stink. One of the stinkiest animals in the world, according to popular opinion.