Hoatzin

The hoatzin is a tropical bird, also called the stinkbirds, skunk bird, Canje pheasant, or reptile bird. They are endemic to South American mangroves, swamps, and riparian forests. Their chicks notably have claws located on their wing digits. 

They are quite the noisy species, often producing hoarse calls like grunts, groans, and croaks. The hoatzin makes noises when spreading their wings or amid other body movements. The hoatzins feed on leaves and occasionally flowers and fruits. Their digestion system is also unique when compared to other birds. They use a bacterial fermentation method to break down the food they consume.