Knot Calidris canutus [Linnaeus, 1758] |
|
| Jump to: Other Names | Trends & Distribution | Breeding & Survival | Biometrics | Books & Links |
|
|
||||
|
For details point at or click the |
Page updated:16-January-2013 |
|
Order:
Charadriiformes
|
Family: Scolopacidae |
|
BTO Codes:
KN, KNOT.
|
EURING No: 4960 | |
|
Number in Britain:
320 thousand birds (Winter)
|
||
|
Conservation Status:
|
||
|
|
||
|
|
||
|
|
||
| Links to: Images Videos Sound | ||
| Tips on Identification | ||
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 cold winters. |
|
|
|
Population and Distribution |
||||||
|
||||||
|
British Population Size:
|
||||
|
Winter:
320 thousand individuals
in 2004-09
|
||||
|
First Record:
Recorded in Medieval times
[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 | ||||
| Migration routes: Map of foreign ringing recoveries and summary map from Time to Fly (in pop-up windows) | ||||
|
European Population Size:
|
||||
|
Summer:
15 to 30 thousand pairs
|
||||
| Population Assesment from Birds in Europe | ||||
| Distribution in Europe mapped by the EBCC Atlas | ||||
|
Listed on the Appendices/Schedules of:
WBD(II*), Bern(III), Bonn(II), AEWA
|
||||
|
||||
|
|
||||
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:
Annual Totals
|
|
|
Adult Survival:
0.841
± 0.066
|
Juvenile Survival:
No data
|
|
Age at First Breeding:
1
year
|
Typical Lifespan:
7
years
|
|
Maximum Recorded Age:
27 years 3 months 29 days (set in 2006)
|
|
| Read a summary of Ringing Recoveries | |
|
|
|
Biometrics |
||
|
Ring Size:
C2
|
||
|
Wing Length
|
Adult: | 170.0 ± 6.2 Range 146.0 - 188.0 mm, (N = 3618) |
| Juvenile: | 165.2 ± 3.9 Range 151.0 - 180.0 mm, (N = 2781) | |
| Male: | Insufficient Data | |
| Female: | Insufficient Data | |
|
Weight
|
Adult: | 137.5 ± 20.16 Range 81.00 - 189.0 g , (N =3564) |
| Juvenile: | 126.9 ± 15.3 Range 80.0 - 185.0 . , (N =2696) | |
| Male: | Insufficient Data | |
| Female: | Insufficient Data | |
| Seasonal: | Summer 134.5 ± 11.05 (N = 937) Autumn 134.9 ± 10.24 (N = 1531) Winter 139.9 ± 12.24 (N = 4308) | |
| 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: | |
Find scientific papers on  Google Scholar
or  Scirus by clicking the icon
|
|
| Wikipedia entry | |
| BirdLife species page | |
| Recent sightings and information from BirdGuides | |
| All About Birds (from the Cornell Lab of Ornithology) | |
| Details from the Patuxent Bird Identification Infocenter | |
| BOU Register of Avian Theses entry | |
|
|
|