There are approximately 9000 species of birds within the Class Aves, but only one species, the hoatzin (Opisthocomus hoazin), has evolved a foregut fermentation system that is similar to that of ...

Have you ever heard of the smelly bird that has claws on its wings? Yes, such an animal does exist—and it’s called the hoatzin. This bird is known for its rotten scent, thanks to its hardworking ...

The hoatzin (Opisthocomus hoazin) is a South American strict folivorous bird, with a crop microbial ecosystem that ferments dietary plants. Chicks progressively become independent from the adult-fed ...

Where it lives: Amazon and Orinoco river basins in South America What it eats: Leaves, fruits and flowers Why it's awesome: The hoatzin is often regarded as one of the world's strangest birds.

The hoatzin, a bizarre bird from the Amazon, has long puzzled scientists. Known for its foul odor and unique traits, it seems like something straight out of a science fiction novel. Recent studies, ...

The Hoatzin is a fascinating blend of bizarre looks, unusual habits, and a unique smell. Photo Credit: X/@TheFrenchNugget ...

Loud and colourful, it is about the size of a pheasant and sports wiry head feathers that resemble a punk’s hair spikes. With oddly primitive-looking features and no close relatives, the hoatzin is an ...