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Adults are brown with black bars on the back and wings. A mid-to-large-sized woodpecker, it measures 28–36 cm (11–14 in) in length and 42–54 cm (17–21 in) in wingspan. The body mass can vary from 86 to 167 g (3.0 to 5.9 oz). Among standard scientific measurements, the wing bone measures 12.2–17.1 cm (4.8–6.7 in), the tail measures 7.5–11.5 cm (3.0–4.5 in), the bill measures 2.2–4.3 cm (0.87–1.7 in) and the tarsus measures 2.2–3.1 cm (0.87–1.2 in).
Flickers may be obseved 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 treeline. Northern Flickers generally nest in holes in trees like other woodpeckers. Occasionally, they have been found nesting in old, earthen burrows vacated by Belted Kingfishers or Bank Swallows. Both sexes help with nest excavation. The entrance hole is about 3 inches in diameter, and the cavity is 13-16 inches deep. The cavity widens at bottom to make room for eggs and the incubating adult. Inside, the cavity is bare except for a bed of wood chips for the eggs and chicks to rest on. Once nestlings are about 17 days old, they begin clinging to the cavity wall rather than lying on the floor.