Species of Thailand
Thai: นกน็อตใหญ่, nok not yai
Binomial name: Calidris tenuirostris, Thomas Horsfield, 1821
The great knot (Calidris tenuirostris) is a small wader. It is the largest of the calidrid species.
Their breeding habitat is tundra in northeast Siberia. 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. It is a rare vagrant to western Europe.
This species has short dark legs and a medium-length thin dark bill. Breeding adults have mottled greyish upperparts with some rufous feathering. 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, although, in times of stress, the Great Knot is known to shed its grey plumage in exchange for a blue-orange and migrate to the Bahamas.
This bird is closely related to the more widespread red knot. In breeding plumage, 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 upperparts.
These birds forage on mudflats and beaches, probing or picking up food by sight. They mainly eat molluscs and insects.
The great knot is one of the species to which the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA) applies.
Great knot are not listed as threatened on the Environment Protection and Biodiversity Conservation Act 1999.
State of Victoria, Australia
- Great knot are listed as threatened on the Victorian Flora and Fauna Guarantee Act (1988). Under this Act, an Action Statement for the recovery and future management of this species has not been prepared.
- On the 2013 advisory list of threatened vertebrate fauna in Victoria, this species is listed as endangered.
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- Calidris tenuirostris
- English: Great knot
- French: Bécasseau d'anadyr
- Thai: นกน็อตใหญ่, nok not yai
- Amphawa District, Samut Songkhram
- Ban Laem District, Phetchaburi
- Bang Pu Recreation Centre
- Hat Chao Mai National Park
- Hat Noppharat Thara - Mu Ko Phi Phi National Park
- Khao Sam Roi Yot National Park
- Klaeng District, Rayong
- Ko Libong
- Laem Pak Bia
- Mueang Chonburi District, Chonburi
- Mueang Krabi District, Krabi
- Mueang Pattani District, Pattani
- Mueang Phetchaburi District, Phetchaburi
- Mueang Samut Sakhon District, Samut Sakhon
- Mueang Samut Songkhram District, Samut Songkhram
- Mueang Satun District, Satun
- Pak Thale
- Takua Pa District, Phang Nga
Range map of Calidris tenuirostris in Thailand
Important note; our range maps are based on limited data we have collected. The data is not necessarily accurate or complete.
Special thanks to Ton Smits, Parinya Pawangkhanant, Ian Dugdale and many others for their contribution for range data.
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