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Mute Swan

From Opus

Photo by tomsphotosOld Moor, Yorkshire, England. 21 June 2016
Photo by tomsphotos
Old Moor, Yorkshire, England. 21 June 2016
Cygnus olor

Contents

[edit] Identification

  • L. 127-152 cm (50-60 in)
  • W. 208-238 cm (82-94 in)
  • Wt. 5500-14300 g (12-31 lbs)

[edit] Adult

JuvenilePhoto by odyAlblasserdam, Holland
Juvenile
Photo by ody
Alblasserdam, Holland
  • White plumage
  • Bright orange bill with black knob at base
  • Male larger, with larger knob
  • Head and neck often stained rusty coloured from iron in water

[edit] Juvenile

  • Dull, greyish-brown, or in some areas, almost white
  • Grey bill without knob

[edit] Distribution

A native of northern and central Eurasia. It is a common resident throughout lowland British Isles, north and central France and east to Denmark and Germany. A summer visitor to southern Norway, southern Sweden and extreme south Finland and Poland and the Baltic States. Also breeds around the northern shores of the Black and Caspian Seas and in parts of Turkey.

In the west most are descended from introduced or feral birds and in Britain especially, live in close association with man. Bred ferally in Iceland in the 1960s but extinct since 1977.

Vagrant to Iceland and the Faroes, Morocco, Spain and the Canary Islands, Mediterranean islands and the Azores.

Female Mute Swan with cygnets,Photo by Andy HurleyRSPB Lodmoor, England, May 2012
Female Mute Swan with cygnets,
Photo by Andy Hurley
RSPB Lodmoor, England,
May 2012

Birds found anywhere else in the world, have been intoduced as an ornamental species in parks and estates. In North America escaped birds have established feral populations in many areas, particularly around the Great Lakes and along the Atlantic coast. Their aggressive behaviour can threaten native waterfowl species and some states are trying to control this species

[edit] Taxonomy

This is a monotypic species1.

[edit] Habitat

Breeds in town parks, flooded gravel-pits, reservoirs and natural wetlands, as well as in protected bays with brackish to salty water. Slow-flowing rivers and large, shallow lakes, often in estuaries and on sheltered coasts out of the breeding season.

[edit] Behaviour

Photo by Florian AndronacheRomania, March 2009
Photo by Florian Andronache
Romania, March 2009

It is a very aggressive bird, especially during the breeding season

[edit] Movement

Often swims with its wings arched and its neck in an S-curve, giving it a very graceful appearance. The neck is fully outstretched in flight

[edit] Breeding

The Mute Swan mates for life, but if one of the pair should die, the other will remate.

The nest is a large mound of vegetation; reeds, grass and other water plants, including seaweed for coastal populations. It is either built on an island or a well vegetated reedy bank. They lay from 5-9 large, greenish-white eggs, usually during April in the UK

[edit] Diet

They eat a variety of aquatic plants, grass and grain. They feed by tipping up like a dabbling duck.

[edit] Vocalisation

Generally silent at rest, but does make hissing and grunting noises. The sound of the wings in flight is highly characteristic and can be heard from a surprising distance. The name 'swan' is thought to be derived from the wing noise, and has the same root as Latin sonus, "sound"2.


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[edit] In Culture

In the UK the Crown owns all unmarked Mute Swans on the River Thames. An annual census (called Swan-upping) is carried out in July, to mark, count and check the health of the population3.

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2016. The eBird/Clements checklist of birds of the world: v2016, with updates to August 2016. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Lockwood, W. B. (1984). The Oxford Book of British Bird Names. OUP.
  3. The Royal Windsor Website
  4. Collins Pocket Guide to British Birds 1966
  5. Collins Bird Guide ISBN 0 00 219728 6
  6. The Observer's Book of Birds' Eggs ISBN 0723200602

[edit] External Links


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