Eurasian magpie on a log, Bhutan

The Eurasian magpie or common magpie (Pica pica) is a resident breeding bird throughout the northern part of the Eurasian continent. It is one of several birds in the crow family designated magpies, and belongs to the Holarctic radiation of “monochrome” magpies. In Europe, “magpie” is used by English speakers as a synonym for the European magpie: the only other magpie in Europe is the Iberian magpie (Cyanopica cooki), which is limited to the Iberian Peninsula. The Eurasian magpie is one of the most intelligent birds, and it is believed to be one of the most intelligent of all non-human animals. Magpies were originally known as simply “pies”. This comes from a proto-Indoeuropean root meaning “pointed”, in reference to either the beak or the tail. The prefix “mag” dates from the 16th century and comes from the short form of the given name Margaret, which was once used to mean women in general (as Joe or Jack is used for men today); the pie’s call was considered to sound like the idle chattering of a woman, and so it came to be called the “Mag pie”. “Pie” as a term for the bird dates to the 13th century, and the word “pied”, first recorded in 1552, became applied to other birds that resembled the magpie in having black-and-white plumage.

The adult male of the nominate subspecies is 44–46 cm (17–18 in) in length, of which more than half is the tail. The wingspan is 52–62 cm (20–24 in). The head, neck and breast are glossy black with a metallic green and violet sheen; the belly and scapulars (shoulder feathers) are pure white; the wings are black glossed with green or purple, and the primaries have white inner webs, conspicuous when the wing is open. The graduated tail is black, glossed with green and reddish purple. The legs and bill are black; the iris is dark brown. The plumage of the sexes is similar but females are slightly smaller. The tail feathers of both sexes are quite long, about 12–28 cm long. Adults undergo an annual complete moult after breeding. Moult begins in June or July and ends in September or October. The primary flight feathers are replaced over a period of three months. Juvenile birds undergo a partial moult beginning about one month later than the adult birds in which their body feathers are replaced but not those of the wings or the tail.

The range of the magpie extends across temperate Eurasia from Spain and Ireland in the west to the Kamchatka Peninsula. The species has been introduced in Japan on the island of Kyushu. The preferred habit is open countryside with scattered trees and magpies are normally absent from treeless areas and dense forests. They sometimes breed at high densities in suburban settings such as parks and gardens. They can often be found close to the centre of cities. Magpies are normally sedentary and spend winters close to their nesting territories but birds living near the northern limit of their range in Sweden, Finland and Russia can move south in harsh weather.[The magpie is omnivorous, eating young birds and eggs, small mammals, insects, scraps and carrion, acorns, grain, and other vegetable substances. The Eurasian magpie has an extremely large range. There is no evidence of any serious overall decline in numbers, so the species is classified by the International Union for Conservation of Nature as being of Least Concern.