Join for FREE
It only takes a minute!
Magnifying the passion for nature. Zeiss Victory Harpia 95. New!

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

Personal tools
Main Categories

Eurasian Bittern

From Opus

Alternative names: Great Bittern

Photo by wim de grootCastricum, The Netherlands, January 2005
Photo by wim de groot
Castricum, The Netherlands, January 2005
Botaurus stellaris

Contents

[edit] Identification

Length 64-80 cm, wingspan 125-135 cm, weight 865-1940 g
A large bird of reed beds. Tawny, mottled brown body with dark streaks, black crown. Dagger-like bill.

[edit] Similar Species

American Bittern is smaller; has no black crown, but instead a black patch on the side of the neck. In flight, superficially resembles a huge owl.

[edit] Distribution

Photo by MahslebMinsmere, Suffolk, April 2011
Photo by Mahsleb
Minsmere, Suffolk, April 2011

Eurasia and Africa.
Europe: breeds at very scattered localities from the Mediterranean north to central Sweden, southernmost Finland, just north of St. Petersburg in Russia, and to a line going east-southeast from there to Asia. Resident locally in England, parts of France, Iberia and northern Italy as well as in the Balkans and Turkey. Summer migrant to areas north and east of there, with partial residency in for example Denmark. In many borderline areas may migrate if inclement weather hits, but populations also diminish after colder than normal winters. Scarce winter visitor in Scotland and Ireland. Vagrants recorded Iceland, Faroes and Norway, Cyprus, and on the Azores, Madeira and Canary Islands.

Middle East: May breed in Israel, probably breeds in Iraq, and vagrants recorded in Syria and Jordan.

Asia: More widespread to the east, occurring across much of temperate Asia from the Caspian to the Pacific coast breeding in the Russian Far East and Sakhalin, perhaps also Hokkaido (Japan). A widespread winter visitor in southern China, northern India, and the northern Philippines. Single records from southern India, Sri Lanka and some countries in south-east Asia.

Africa north of the Sahara: Resident and winter visitor in the Nile delta and in one to two locations west of that along the Mediterranean coast.

Africa south of the Sahara: The subspecies B. s. capensis is resident discontinuously from southern Tanzania and Zambia south to the southern Africa where rare. This race is probably resident with local movements; these may be governed by rains but is also described as poorly understood. Nominate B. s. stellaris occurs as a winter visitor along the Nile to Kenya and west from there to Nigeria.

[edit] Taxonomy

Photo by Duke LetoRSPB Strumpshaw Fen, Norfolk, November 2012
Photo by Duke Leto
RSPB Strumpshaw Fen, Norfolk, November 2012

[edit] Subspecies

There are two subspecies[1]:

  • B. s. stellaris:
  • B. s. capensis:

[edit] Habitat

Densely vegetated swamps with small areas of open water but prefers extensive reedbeds. Sometimes in smaller reed-patches or other vegetation but rarely seen in the open.

On passage and in winter may become more obvious and occurs in a wider range of wet habitats, sometimes around disused gravel-pits and reservoirs.

[edit] Behaviour

The bird is secretive and very difficult to spot if it does not break cover. It is superbly camouflaged for its reed bed habitat and uses this to stalk its prey. When threatened, often stretches up in a slender pose to maximise camouflage among erect reed stems.

[edit] Diet

It feeds in a similar manner to the Grey Heron, stabbing and snapping with its sharp beak and can remain hunched and utterly motionless for hours at a time.

[edit] Movement

When moving it is generally in a slow, creeping stalk that is difficult to pick out though it does sometimes dart rapidly forwards.

Bitterns do fly from reed bed to reed bed and this is a good time to spot them. Their flight is low and rapid with relatively slow, powerful, purposeful wingbeats.

[edit] Vocalisation

Male Bitterns make a booming call to announce territory and display to potential mates. Both sexes make a guttural croak in flight infrequently.


Listen in an external program

[edit] References

  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, B.L. Sullivan, C. L. Wood, and D. Roberson. 2012. The eBird/Clements Checklist of Birds of the World. 6th ed., with updates to October 2012. Ithaca: Cornell Univ. Press. ISBN 978-0801445019. Spreadsheet available at http://www.birds.cornell.edu/clementschecklist/downloadable-clements-checklist
  2. Beaman, M., S. Madge, K.M. Olsen. 1998. Fuglene i Europa, Nordafrika og Mellemøsten. Copenhagen, Denmark: Gads Forlag, ISBN 87-12-02276-4
  3. Sinclair et al. 2002. Birds of Southern Africa. Princeton Field Guides, Princeton, New Jersey, USA. ISBN 0-691-09682-1
  4. Svensson, Mullarney, Zetterström 2009. Birds of Europe, second edition. Princeton University Press, Princeton and Oxford. ISBN 978-0-691-14392-7
  5. Grimmett, Inskipp & Inskipp 2012. Birds of India, Pakistan, Nepal, Bangladesh, Bhutan, Sri Lanka, and The Maldives. Princeton Field Guides. ISBN 978-0-691-15349-0
  6. Collins Field Guide 5th Edition ISBN 0 00 219900 9

[edit] External Links



Advertisement


Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.31983709 seconds with 9 queries
All times are GMT. The time now is 09:04.