Read, Watch or Listen

The hoatzin, a South American bird, is known for its unique traits: clawed hatchlings, a strong odor from its cow-like digestive system, and its uncertain evolutionary placement. This unusual digestive system, efficient at breaking down leaves, gives it a pungent smell that acts as a defense mechanism. Recent genetic studies have yielded conflicting results regarding its evolutionary age and position within the avian family tree, classifying it as an 'evolutionary orphan'. Despite this uncertainty, the hoatzin remains a fascinating and distinctive bird.

Prepared by Olivia Bennett and reviewed by editorial team.