Amazonian royal flycatcher

Onychorhynchus coronatus coronatus

This delightful little bird, with its flamboyant headdress, has rather an unusual nest. Built by the female, it is an enclosed column 6ft (2m) tall with an entry hole near the top. These huge nests are suspended 16–20ft (5–6m) above water to keep them safe from predators. For a bird that is only around 6.5in (16.5cm) long that’s quite the living space.