Identification
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Attractive ground-dwelling bird. Slender and long-tailed, bright yellow below with paler throat and grayish-olive back; extremely variable. Tail is black with white outer feathers; often pumps tail up and down while walking on the ground. Young birds lack yellow color, but have distinctive head pattern. Often seen near water. Listen for high-pitched, piercing call note. Common breeder on Arctic tundra from Alaska to Russia; found in grassy and waterside habitats in Southeast Asian wintering grounds and in migration.
Relative Size
Slightly smaller than American Pipit and Red-throated Pipit.


Measurements
- Both Sexes
- Length: 6.7 in (17 cm)
- Weight: 0.5-0.8 oz (15.1-21.7 g)
Regional Differences
Ornithologists recognize three Eastern Yellow Wagtail subspecies groups: “Eastern,” “Green-headed,” and “Manchurian.” The “Eastern” group breeds from central Siberia east to Alaska and extreme western Canada. The “Green-headed” group breeds from southeastern Siberia to northern Japan. The “Manchurian” group breeds from northeastern Mongolia to southeasternmost Russia. During the nonbreeding season, when females and immatures can be very difficult to identify to group, all three subspecies groups occur in southeastern Asia, with some ranging west to India and others south to Australia. The main difference between the groups is the head color and pattern of breeding males. “Eastern” male has a gray crown, white line above the eye, and grayish to blackish mask. “Green-headed” male has a greenish crown, yellow stripe above the eye, and black mask through the eye. “Manchurian” male has a slaty gray crown and black mask around the eye.