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Great knot
The great knot (Calidris tenuirostris) is a small wader. It is one of the largest species in the genus Calidris. It is a migratory bird which breeds in eastern Siberia, Russia, and flies to southern Asia and Australia in the northern winter.
Within the genus Calidris the great knot is most closely related to the surfbird (Calidris virgata).
The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds. The specific tenuirostris is from Latin tenuis "slender" and rostrum "bill".
Their breeding habitat is tundra in northeast Siberia, Russia. They nest on the ground laying about four eggs in a ground scrape. They are strongly migratory wintering on coasts in southern Asia through to Australia. This species forms enormous flocks in winter.
The species is also recorded in summer in low numbers in western Alaska, United States in most years, and in winter in small numbers west to Pakistan, Oman, and the United Arab Emirates. It has occurred as a vagrant in Great Britain, Morocco, New Zealand, British Columbia in Canada, and in the lower 48 states of the USA in Oregon, West Virginia, and Maine.
Calidris tenuirostris, commonly known as the great knot, is one of the largest species of the genus Calidris, in the family Scolopacidae. The ruff C. pugnax, with its marked sexual dimorphism in size, can have larger males, but its females are much smaller. Its sister species, the surfbird C. virgata and red knot C. canutus, are the next largest. Adult great knots can measure 26 to 30 cm (10 to 12 in), with a wingspan of 56 to 66 cm (22 to 26 in), and weighing 115 to 261 g (4.1 to 9.2 oz).
This species has short dark legs and a medium-length thin dark bill. Breeding adults have mottled greyish upper parts, with a distinct band of rufous feathering on the scapular feathers. The face, throat and breast are heavily spotted black, and there are also some streaks on the rear belly. In winter the plumage becomes uniformly pale grey above.
It is distinguished from the red knot by its breeding plumage, in which the latter has a distinctive red face, throat and breast. In other plumages, the great knot can be identified by its larger size, longer bill, deeper chest, and the more streaked upper parts.
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Great knot
The great knot (Calidris tenuirostris) is a small wader. It is one of the largest species in the genus Calidris. It is a migratory bird which breeds in eastern Siberia, Russia, and flies to southern Asia and Australia in the northern winter.
Within the genus Calidris the great knot is most closely related to the surfbird (Calidris virgata).
The genus name is from Ancient Greek kalidris or skalidris, a term used by Aristotle for some grey-coloured waterside birds. The specific tenuirostris is from Latin tenuis "slender" and rostrum "bill".
Their breeding habitat is tundra in northeast Siberia, Russia. They nest on the ground laying about four eggs in a ground scrape. They are strongly migratory wintering on coasts in southern Asia through to Australia. This species forms enormous flocks in winter.
The species is also recorded in summer in low numbers in western Alaska, United States in most years, and in winter in small numbers west to Pakistan, Oman, and the United Arab Emirates. It has occurred as a vagrant in Great Britain, Morocco, New Zealand, British Columbia in Canada, and in the lower 48 states of the USA in Oregon, West Virginia, and Maine.
Calidris tenuirostris, commonly known as the great knot, is one of the largest species of the genus Calidris, in the family Scolopacidae. The ruff C. pugnax, with its marked sexual dimorphism in size, can have larger males, but its females are much smaller. Its sister species, the surfbird C. virgata and red knot C. canutus, are the next largest. Adult great knots can measure 26 to 30 cm (10 to 12 in), with a wingspan of 56 to 66 cm (22 to 26 in), and weighing 115 to 261 g (4.1 to 9.2 oz).
This species has short dark legs and a medium-length thin dark bill. Breeding adults have mottled greyish upper parts, with a distinct band of rufous feathering on the scapular feathers. The face, throat and breast are heavily spotted black, and there are also some streaks on the rear belly. In winter the plumage becomes uniformly pale grey above.
It is distinguished from the red knot by its breeding plumage, in which the latter has a distinctive red face, throat and breast. In other plumages, the great knot can be identified by its larger size, longer bill, deeper chest, and the more streaked upper parts.