EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Distribution and population size of the bittern Botaurus stellaris in lower Saxony results of a state-wide census in 2004 Verbreitung und Bestand der Rohrdrommel Botaurus stellaris in Niedersachsen Ergebnisse einer landesweiten Erfassung 2004


Vogelkundliche Berichte aus Niedersachsen. Dezember; 381-2: 25-37
Distribution and population size of the bittern Botaurus stellaris in lower Saxony results of a state-wide census in 2004 Verbreitung und Bestand der Rohrdrommel Botaurus stellaris in Niedersachsen Ergebnisse einer landesweiten Erfassung 2004
A state-wide census of the Bittern was carried out in Lower Saxony in 2004. The results are based on reports of more than 50 ornithologists and own observations. Additionally, data from 2000 to 2003 were analysed. Over the period 2000-2004 there were 15 breeding-populations known. Ten territories in nine populations were recorded in 2004. Because of deficient data for some sites the current population size in Lower Saxony is estimated at appr. 10-15 territories. After a decline of more than 50 % from 1975 to 1999 the population size is presently stable on a very low level. Currently the Bittern is only locally distributed in the regions 'Watten and Marschen', 'Weser-Aller-Flachland' and 'Borden'. Approximately 60% of the population in Lower Saxony are in Special Protection Areas. Reedbeds are most commonly used as breeding habitat, mostly associated with man-made standing waters. In the fluvial plains of the Weser and the Elbe only few observations of breeding Bitterns were made in the past years. Most of the populated reedbeds are full of structures such as pools and shrubs. The majority of the populations are in areas not or rarely visited by the public and free of water-sport. The destruction of natural habitats was the main cause of the decline in populations in the past decades. Possibly the decline in populations in the last century could not be compensated due to lack of suitable breeding habitats. Availability of food and predation may also be factors, but there is too little data on this. Due to the current low population, the negative trend in the records, uncertain reproduction and multiple threats the Bittern in Lower Saxony has an unfavourable conservation status.


Accession: 038153644



Related references

Verbreitung und Bestand der Rohrdrommel (Botaurus stellaris) in Niedersachsen: Ergebnisse einer landesweiten Erfassung 2004. Vogelkundliche Berichte aus NiedersachsenDezember; 38(1-2): 25-37, 2006

Distribution, population size and habitat preference of the woodlark Lullula arborea in Lower Saxony 2004 results of a state-wide census Verbreitung, Bestand und Habitwahl der Heidelerche Lullula arborea in Niedersachsen Ergebnisse einer landesweiten Erfassung 2004. Vogelkundliche Berichte aus Niedersachsen. Oktober; 371: 31-58, 2005

Distribution, population size and habitat preference of the European nightjar Caprimulgus europaeus in Lower Saxony 2003 results of a statewide census Verbreitung, Bestand und Habitatwahl des Ziegenmelkers Caprimulgus europaeus in Niedersachsen Ergebnisse einer landesweiten Erfassung 2003. Vogelkundliche Berichte aus Niedersachsen. Dezember; 362: 131-162, 2004

Distribution, population size and habitat choice of the black kite Milvus migrans in Lower Saxony results of a countrywide census in 2003 Verbreitung, Bestand und Habitatwahl des Schwarzmilans Milvus migrans migrans in Niedersachsen Ergebnisse einer landesweiten Erfassung 2003. Vogelkundliche Berichte aus Niedersachsen. August; 361: 1-17, 2004

Distribution, population size and habitat choice of bluethroat Luscinia svecica cyanecula in Lower Saxony 2001 results of a countrywide census Verbreitung, Bestand und Habitatwahl des Blaukehlchens Luscinia svecica cyanecula in Niedersachsen 2001 Ergebnisse einer landesweiten Erfassung. Vogelkundliche Berichte aus Niedersachsen. August; 341: 1-21, 2002

Distribution, population size and habitat choice of the eagle owl Bubo bubo in Lower Saxony Results of a countrywide census in 2002 Vebreitung, Bestand und Habitatwahl des Uhus Bubo bubo in Niedersachsen Ergebnisse einer landesweiten Erfassung 2002. Vogelkundliche Berichte aus Niedersachsen. Juli; 351: 39-54, 2003

Historical evolution and current state of the population of the bittern Botaurus stellaris in Modena Evoluzione storica ed attuale consistenza della popolazione di tarabuso Botaurus stellaris nel Modenese. Picus. gennaio-giugno; 271: 45-49, 2001

Behaviour of a bittern Botaurus stellaris in winter Beobachtungen zum Verhalten einer uberwinternden Rohrdommel Botaurus stellaris. Limicola. Juni; 103: 114-122, 1996

Verbreitung, Bestand und Habitwahl der Heidelerche (Lullula arborea) in Niedersachsen: Ergebnisse einer landesweiten Erfassung 2004. Vogelkundliche Berichte aus NiedersachsenOktober; 37(1): 31-58, 2005

Booming activity in a population of bittern Botaurus stellaris in Tuscany Attivita di canto in una popolazione di tarabuso Botaurus stellaris della toscana. Supplemento alle Ricerche di Biologia della Selvaggina. Marzo; 22: 631-633, 1995