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Knot Calidris canutus [Linnaeus, 1758]
Other Names
Trends & Distribution
Breeding & Survival
Biometrics
Books & Links
Order:
Charadriiformes
Family:
Scolopacidae
BTO Codes:
KN, KNOT.
EURING No:
4960
Number in Britain:
284 thousand birds (Winter)
Conservation Status:
UK:
AMBER
European:
3 Concern, most not in Europe; Declining
Global:
Least Concern
Links to: Images
Videos
Sound
Status in UK:
(A) Passage/Winter Visitor
Subspecies:
canutus , islandica recorded in Britain (of 6 subsp. in the world)
.
Length:
24 cm
Wingspan:
59 cm
Weight:
M/F: 140 g
Scientific name from:
Gr.: kalidris =grey waterside bird described by Aristotle
and after Canute (995-1035), king of England
World Distribution:
BREEDS: arctic North America, Greenland, n Siberia, WINTERS: Europe, s Asia south to s Africa & Australia, s South America
Habitat:
Tundra, on migration coastal
Diet:
Summer, insects and plant material, Winter Inter-tidal invertebrates, esp molluscs
TitBit:
The Knot's name, recalling King Canute, stems from the fact that it is often found feeding on the tide edge, sometimes in large numbers - with flocks in excess of 100,000 birds appearing like drifts of smoke in the sky sometimes recorded, especially in col
d winters
Population and Distribution
Population Trend:
No population trend available
Distribution:
New Atlas )
British Population Size:
Winter:
284 thousand individuals
in 1994-99
First Record:
15th Century
[Fossil evidence from
Devensian (last) glaciation, 10-120,000 yr ago]
Conservation Status:
AMBER
because
Species of European Concern,
Localised Non-breeding Population,
Important Non-breeding Population
Previous Assessments:
2002-2007
AMBER
1996-2001
AMBER
Races of Concern:
, islandica AMBER (European Concern)
Habitat Occupancy (in the Breeding Season):
No habitat data from BBS
European Population Size:
Summer:
15 to 30 thousand pairs
Birds in Europe
Listed on the Appendices/Schedules of:
WBD(II*), Bern(III), Bonn(II), AEWA
Survey Results:
Breeding and Survival
Egg Size:
43 x 30 mm
Egg Weight:
19.3 g (of which 5 % is shell)
Number of Nest Records:
0
Clutch Size:
4 eggs
Incubation:
21- 22 days
by the:
Male + Female
Fledging:
18 - 20days
as:
Precocial, downy
First Clutches Laid:
Does not breed in Britain, or too few Nest Records
Number of Broods:
1
Number Ringed:
1661
Adult Survival:
0.841
± 0.066
Juvenile Survival:
No data
Age at First Breeding:
1
year
Typical Lifespan:
7
years
Maximum Recorded Age:
27yr 3m
Biometrics
Ring Size:
C2
Wing Length
Adult:
169.4 ± 6.2
Range
159 - 179 mm, N =3618
Juvenile:
164.7 ± 3.9
158 - 171 mm, N =1589
Male:
Insufficient Data
Female:
Insufficient Data
Weight
Adult:
138.1 ± 20.16
Range
120.0 - 158.0 g , N =3564
Juvenile:
131.2 ± 14.72
107.0 - 156.0 g , N =1540
Male:
Insufficient Data
Female:
Insufficient Data
Source:
British Trust for Ornithology (2005) Ringing Scheme data
Other Names
Red Knot
Gaelic:
Luatharan-gainmhich
Welsh:
Pibydd yr Aber
Danish:
Islandsk ryle
Dutch:
Kanoet
Finnish:
Isosirri
French:
Bécasseau maubčche
German:
Knutt
Hungarian:
Sarki partfutó
Icelandic:
Rauđbrystingur
Irish:
Cnota
Italian:
Piovanello maggiore
Norwegian:
Polarsnipe
Polish:
Biegus rdzawy
Portuguese:
Seixoeira
Spanish:
Correlimos gordo
Swedish:
Kustsnäppa
For More Information...
Books and Monographs:
Harrington, B. 1996 The flight of the red knot W.W. Norton, New york
[598.612 HAR]
Piersma, T. 1994 Close to the edge Uitgeverij Het Open Boek, Den Burg
[598.612 PIE]
See Also:
All About Birds (Cornell Lab of Ornithology)
Gough, G.A. et al. (1998) Patuxent Bird Identification Infocenter
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