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The greater yellowlegs (Tringa melanoleuca) is a large North American shorebird. The genus name Tringa is the New Latin name given to the green sandpiper by Aldrovandus in 1599 based on Ancient Greek trungas, a thrush-sized, white-rumped, tail-bobbing wading bird mentioned by Aristotle. The specific melanoleuca is from Ancient Greek melas, "black", and leukos, "white".
The greater yellowlegs is similar in appearance to the smaller lesser yellowlegs. Its closest relative, however, is the greenshank, which together with the spotted redshank form a close-knit group. Among them, these three species show all the basic leg and foot colors found in the shanks, demonstrating that this character is paraphyletic. They are also the largest shanks apart from the willet, which is altogether more robustly built. The greater yellowlegs and the greenshank share a coarse, dark, and fairly crisp breast pattern as well as much black on the shoulders and back in breeding plumage.
Adults have long yellow legs and a long, thin, dark bill which has a slight upward curve and is longer than the head. The body is grey-brown on top and white underneath; the neck and breast are streaked with dark brown. The rump is white. It ranges in length from 29 to 40 cm (11 to 16 in) and in weight from 111 to 250 g (3.9 to 8.8 oz). Wingspan is 23.6 in (60 cm).
Breeding & migration
Their breeding habitat is bogs and marshes in the boreal forest region of Canada and Alaska. They nest on the ground, usually in well-hidden locations near water. The three to four eggs average 50 mm (2.0 in) in length and 33 mm (1.3 in) in breadth and weigh about 28 g (0.99 oz). The incubation period is 23 days. The young leave the nest within 24 hours of hatching and then leave the vicinity of the nest within two days.
These birds forage in shallow water, sometimes using their bills to stir up the water. They mainly eat insects and small fish, as well as crustaceans and marine worms. It often walks in sand or mud and leaves clear tracks; it can be possible to gather information about this species using its tracks.
The call is harsher, and louder and clearer, than that of the lesser yellowlegs. They have a three-syllable whistle when flight-calling, with a lower pitched third syllable.
- BirdLife International (2012). "Tringa melanoleuca". IUCN Red List of Threatened Species. 2012. Retrieved 26 November 2013.CS1 maint: ref=harv (link)old-form url
- Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 247, 390. ISBN 978-1-4081-2501-4.
- Pereira, S.L.; Baker, A.J. (2005). "Multiple Gene Evidence for Parallel Evolution and Retention of Ancestral Morphological States in the Shanks (Charadriiformes: Scolopacidae)". Condor. 107 (3): 514–526. doi:10.1650/0010-5422(2005)107[0514:MGEFPE]2.0.CO;2.
- "Greater Yellowlegs Identification, All About Birds, Cornell Lab of Ornithology". www.allaboutbirds.org. Retrieved 2020-09-30.
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- Greater yellowlegs species account - Cornell Lab of Ornithology
- Greater yellowlegs - Tringa melanoleuca - USGS Patuxent Bird Identification InfoCenter
- BirdLife species factsheet for Tringa melanoleuca
- "Tringa melanoleuca". Avibase.
- "Greater yellowlegs media". Internet Bird Collection.
- Greater yellowlegs photo gallery at VIREO (Drexel University)
- Interactive range map of Tringa melanoleuca at IUCN Red List maps
- Audio recordings of Greater yellowlegs on Xeno-canto.
- Tringa melanoleuca in Field Guide: Birds of the World on Flickr