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Black Tern

From Opus

(Difference between revisions)
Revision as of 16:54, 17 September 2011 (edit)
Deliatodd-18346 (Talk | contribs)
(References updated)
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Current revision (19:08, 13 June 2012) (edit) (undo)
IanF (Talk | contribs)

 
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Freshwater lakes, gravel pits and reservoirs, marshes, wet grassland, seacoast and estuaries. Freshwater lakes, gravel pits and reservoirs, marshes, wet grassland, seacoast and estuaries.
<gallery> <gallery>
-Image:d07_0864.jpg|Male in flight<br /> Photo by {{user|Gary+Clark|Gary Clark}} <br />Wainright, [[Alberta]], [[Canada]] 
-Image:d07_0865.jpg|Male in flight<br /> Photo by {{user|Gary+Clark|Gary Clark}} <br />Wainright, [[Alberta]], [[Canada]] 
Image:31141blacktern.jpg|Subspecies ''Niger''<br />{{user|xentox|xentox}}<br />[[Liberia]], May 2005 Image:31141blacktern.jpg|Subspecies ''Niger''<br />{{user|xentox|xentox}}<br />[[Liberia]], May 2005
</gallery> </gallery>

Current revision

North American Black Tern, Fall plumage.Dmitry Mozzheri Long Island, New York
North American Black Tern, Fall plumage.
Dmitry Mozzheri
Long Island, New York
Chlidonias niger

Contents

[edit] Identification

Breeding (May - ca. July): Black head, breast and belly. Uniform grey back, wings and rump/tail. White undertail. Bill black. Dark legs.

Non-breeding: Underparts white, grey above. Falcon-like black hood. Characteristic black (or dark brown) line above shoulder, extending onto outer edges of breast. Legs orange/red. Bill black. Tail off-white with grey rump and upper tail coverts (white in White-winged Tern Chlidonias leucopterus).

Juvenile: Like non-breeding adult but with distinct buff/lighter edges to back feathers and coverts.

Subspecies Niger Photo by MirageNetherlands, June 2007
Subspecies Niger
Photo by Mirage
Netherlands, June 2007

[edit] Distribution

The range of the Black Tern is almost worldwide.

[edit] Taxonomy

[edit] Subspecies

Chlidonias niger has two subspecies[1]:

  • C. n. niger (Eurasian):
  • C. n. surinamensis (North American):

[edit] Habitat

Freshwater lakes, gravel pits and reservoirs, marshes, wet grassland, seacoast and estuaries.

[edit] Behaviour

[edit] Diet

The diet includes insects, invertebrates and fish.

[edit] Breeding

The nest is usually floating vegetation in shallow water (possibly on the ground close to water). The clutch consists of 2-4 eggs which are incubated for 21-22 days. The young fledge after 19-25 days.

[edit] Vocalisation


Listen in an external program

[edit] References

  1. Clements, JF. 2011. The Clements Checklist of Birds of the World. 6th ed., with updates to August 2011. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
  2. Lepage D. 2008. Avibase. Search for "Black Tern" downloaded 29 April 2008.
  3. Wikipedia

[edit] External Links


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