Black-billed Magpie

The Black-billed Magpie (Pica hudsonia) is one of the most charismatic and recognizable birds of western North America. A member of the Corvidae (crow and jay) family, this large songbird is famous for its striking black-and-white plumage, exceptionally long, wedge-shaped tail, and sophisticated, highly social behavior. Like other corvids, it possesses remarkable intelligence, displaying complex problem-solving abilities and a highly developed social structure.

Key Field Marks

• Plumage: A stark contrast of velvety jet-black on the head, breast, and back, alongside a brilliant white belly and clean white scapulars (shoulder patches).
• Iridescence: The black wings and tail are not purely black; they gleam with a metallic, dark-green to blue-green iridescence under direct sunlight.
• Tail: Extremely long, accounting for more than half of the bird's total length. It is wedge- or diamond-shaped and constantly used for balance and display.
• In Flight: Look for flash of bright white on the outer primary feathers of the wings, forming a dramatic contrast with the dark wing tips.
• Bill: Entirely black, stout, and slightly curved.

Similar Species

• Yellow-billed Magpie (Pica nuttalli): Found exclusively in California's Central Valley and coastal valleys. Visually identical except for its bright yellow bill and yellow skin around the eyes.
• Eurasian Magpie (Pica pica): Extremely similar but found exclusively in Europe and Asia. The Black-billed Magpie has a slightly heavier build and different vocalizations.

Range and Distribution

The Black-billed Magpie is a year-round resident of western North America. Its range extends from coastal southern Alaska and western Canada (Yukon, British Columbia, Alberta, Saskatchewan) southward through the Rocky Mountains, Great Basin, and Great Plains down to northern New Mexico and Arizona. They are generally non-migratory, remaining in their breeding territories throughout the winter.

Preferred Habitats

Magpies thrive in a mosaic of open country and cover. Key habitats include:

• Riparian Corridors: Streamside groves of cottonwood and willow.
• Agricultural Areas: Ranches, pastures, and fields where foraging is easy.
• Edge Habitats: Forest edges and brushy fields next to open grasslands.
• Human Landscapes: Suburban parks, gardens, and refuse areas where they exploit human-provided food sources.

Sociality and Foraging

Black-billed Magpies are highly social birds, often seen in pairs, family units, or loose winter flocks. They are opportunistic omnivores, foraging primarily on the ground. Their diet consists of insects (grasshoppers, beetles), small mammals, carrion, seeds, berries, and eggs. They regularly follow predators like wolves or cougars to scavenge carcasses and are known to pluck ticks and other parasites from the backs of large mammals like deer, elk, and bison.

Nesting and Breeding

Magpies construct massive, conspicuous dome-shaped nests made of sticks, twigs, and mud. These dual-entrance structures can take up to 40 days to build and are often placed in the forks of deciduous trees or dense shrubs. The dome protects the incubating female and young from aerial predators like hawks and owls.

Vocalizations

Magpies are highly vocal, expressing a wide array of harsh, raspy corvid sounds. Common vocalizations include:

• A rapid, rising "wack-wack-wack-wack" alarm call.
• A nasal, questioning "mag? mag?" or "yak-yak" contact call.
• Soft, musical warbles emitted during courtship or social gatherings.