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Northern Waterthrush Video Stock Footage
The northern waterthrush is a large New World warbler (and not a thrush, despite the name). It has a length of 12–15 cm (4.7–5.9 in), wingspan of 21–24 cm (8.3–9.4 in) and weighs between 13 and 25 g (0.46 and 0.88 oz) Among standard measurements, the wing chord is 6.8 to 8.2 cm (2.7 to 3.2 in), the tail is 4.5 to 5.7 cm (1.8 to 2.2 in), the bill is 1.1 to 1.2 cm (0.43 to 0.47 in) and the tarsus is 1.9 to 2.3 cm (0.75 to 0.91 in). On the head, the crown is brown with a white supercilium. The bill is pointed and dark. The throat is lightly streaked brown to black with heavier streaking continuing onto the breast and flanks. The back is evenly brown. Sexes are morphologically similar. Young birds have buff, rather than white underparts. The only species bird watchers confuse with the northern waterthrush is the closely related Louisiana waterthrush (Parkesia motacilla), which has buff flanks, a buff undertail, and bright pink legs. The Louisiana waterthrush also has a whiter throat with fewer streaks. More subtle clues include smaller size and smaller bill, a narrower and darker eye-line, and different call note and habits. Both waterthrush species walk rather than hop, and seem to teeter, since they bob their rear ends as they move along.
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