The Andean-Cock-of-the-Rock sounds like a cross between a chainsaw and a squealing pig. The national bird of Peru, male birds of this species sport a splendid bright red plumage along with a head crest reminiscent of a knight’s battle helmet. Females choose their mate from among a group of…

To out-sip their competition, Sword-billed Hummingbirds have a distinct adaptation: these birds’ beaks are longer than their bodies. Found in temperate forests from Venezuela to Bolivia, these hummingbirds rely entirely on tube-like flowers that other species could never reach. While most…