The Northern Flicker (Colaptes auratus) or Common Flicker is a medium-sized bird of the woodpecker family. It is native to most of North America, parts of Central America, Cuba, and the Cayman Islands, and is one of the few woodpecker species that migrate. Over 100 common names for the northern flicker are known, including yellowhammer (not to be confused with the Eurasian yellowhammer), clape, gaffer woodpecker, harry-wicket, heigh-ho, wake-up, walk-up, wick-up, yarrup, and gawker bird. Many of these names derive from attempts to imitate some of its calls.
The northern flicker is part of the genus Colaptes, which encompasses 12 New World woodpeckers. Nine subspecies (one of them extinct) of C. auratus are recognized. The existing subspecies were at one time considered separate species, but they commonly interbreed where ranges overlap and are now considered one species by the American Ornithologists Union. This is an example of the "species problem”.
Males have a black moustache. Colaptes comes from the Greek verb colapt, meaning "to peck"; auratus is from the Latin root aurat, meaning "gold" or "golden", and refers to the bird's underwing. As the state bird of Alabama, this subspecies is known by the common name "yellowhammer", a term that originated during the American Civil War to describe Confederate soldiers from Alabama.
The western red-shafted flicker (C. a. cafer) resides in western North America. They are red under the tail and underwings and have red shafts on their primaries. They have a beige cap and a grey face. Males have a red moustache. The subspecific name cafer is the result of an error made in 1788 by the German systematist Johann Gmelin, who believed that its original habitat was in South Africa among the Xhosa people, then known as the “Kaffirs".
This bird's call is a sustained laugh, ki ki ki ki, quite different from that of the pileated woodpecker. One may also hear a constant knocking as they often drum on trees or even metal objects to declare territory. Like most woodpeckers, northern flickers drum on objects as a form of communication and territory defense. In such cases, the object is to make as loud a noise as possible, so woodpeckers sometimes drum on metal objects.
Like many woodpeckers, its flight is undulating. The repeated cycle of a quick succession of flaps followed by a pause creates an effect comparable to a rollercoaster.
Flickers may be observed in open habitats near trees, including woodlands, edges, yards, and parks. In the western United States, one can find them in mountain forests all the way up to tree line. Northern flickers generally nest in holes in trees like other woodpeckers.