Description wikipedia

The long-billed dowitcher (Limnodromus scolopaceus) is a medium-sized shorebird with a relatively long bill belonging to the sandpiper family, Scolopacidae. In breeding plumage, adults are characterized by a rufous head and underparts with a darker mottled back and a large white upper rump only seen in flight. They feed in various freshwater habitats with their bill underwater in a "sewing machine" motion and have a mating display where males chase females in flight. The genus, Limnodromus is Ancient Greek from limne, "marsh" and dromos, "racer". The specific scolopaceus is Neo-Latin for "snipe-like", from Latin scolopax, scolopacis, a snipe or woodcock. The English name is from Iroquois and was first recorded in 1841. The long-billed dowitcher is similar in appearance to the short-billed dowitcher and was only recognized as a separate species in 1950. Between the two, the best distinguishing field mark is their flight call, especially in winter, when the two species' plumage can be nearly identical. However, the two species differ ecologically in their habitat preferences and breeding locations. Long-billed dowitchers generally prefer freshwater habitats, and breed in northern Alaska and Siberia; their short-billed counterparts favor saltwater habitats and breed farther east, from southern Alaska across Canada to the maritime provinces.