July 5, 2011. Wadden Sea Ecosystem No. 30-2010 Migratory Waterbirds in the Wadden Sea 1987-2008 Laursen, K., Blew, J., Eskildsen, K., Gunther, K., Halterlein, B., Kleefstra, R., Luersen, G., Potel, P., Schrader, S. 2010. Migratory Waterbirds in the Wadden Sea 1987- 2008. Wadden Sea Ecosystem No.30. Common Wadden Sea Secretariat, Joint Monitoring Group of Migratory Birds in the Wadden Sea, Wilhelmshaven, Germany. Download the report   - low picture quality (6 Mb)                                    - high picture quality (48 Mb)
Press release Migratory birds in the Wadden Sea are sensitive to climate change Report on status of 34 migratory bird species in the international Wadden Sea Wilhelmshaven, 5 July 2011: The International Wadden Sea Area, with its 14.7 thousand kmē, is the most significant resting, moulting and wintering ground for waterfowl and waders along the East-Atlantic flyway between the Arctic and South Africa. In 2009 the high national and international protection status of the territory was recognized by inscription of the Wadden Sea into the UNESCO World Heritage list. The International Wadden Sea Secretariat has now released a common report on the status of shore birds, which additionally examines trends of the arrival and fly-away periods of the birds, the distribution of bird species in the various regions and the potential impact of climate change over the last 21 years. 14 bird species out of 34 of all counted, such as Oystercatchers, Avocets, Kentish plovers, Herring Gulls and others, have reduced in quantity significantly, while 20 species such as Eurasian Spoonbill, Bar-tailed Godwit, Sanderling and Grey Plover show an increase. Particularly species that breed and wintering in North, Central or Western Europe seem to be influenced by the conditions in North-West Europe, which has a negative impact on the trends. Some bird species, especially those that breed in the Arctic or in northern Europe, arrive  at the Wadden Sea later in spring as 20 years ago, which can possibly be attributed to climate change. In last decades the distribution of birds in the Wadden Sea region seems to depend on environmental changes. For many species, that feed on mudflats, in the last 21 years the trend in Denmark and the Netherlands has remained stable, while the numbers in Schleswig-Holstein and Lower Saxony show a negative trend. Here the correlation between trend and sediment composition, which has changed in the last 20 years due to the climate change, is established. "For the first time, in addition to detailed trend analysis the bird counts for over 20 years are used to make more precise conclusion about the arrival time and spatial distribution of flyway birds in the Wadden Sea Area. Even if the results indicate that some of the reasons for the negative trends could be found in the Wadden Sea area or in climate change, the causes must be also sought for and acted upon along the entire bird flyways. In preparation is a federally funded three-year project that aims at improvement of the local expertise in the field of bird conservation, which will be implemented in West Africa, "says Jens Enemark, Head of the International Wadden Sea Secretariat, Wilhelmshaven. For over 20 years, the Wadden Sea Secretariat together with the Joint Monitoring Group of Migratory Birds (JMMB) coordinates a program for counting of migratory birds in the Wadden Sea. The commitment of many volunteer bird counters and professional ornithologists around the Wadden Sea enables multiple coordinated censuses every year, on the basic of which the trend calculations are built. Download German press release.
May 26, 2011. Migratory Bird Trends until 2008/2009 JMMB 2010. Trends for the whole 22 and last 10 years time period of migratory and wintering waterbirds in the Wadden Sea 1987/88-2008/09. JMMB 2010
July 5, 2011. Breeding Bird Trends until 2008 JMBB 2010. Trends for the whole 18 years period of breeding birds in the Wadden Sea 1991-2008. JMBB 2010

Migratory Birds

Trends:
	Migratory Bird Trends until 2008/2009
Wadden Sea Ecosystem Reports:
No. 27	Exploring Contrasting Trends of Migratory Waterbirds in the Wadden Sea Ens, B. J., Blew, J., Roomen van, M.W.J., Turnhout van, C.A.M., 2009. Exploring contrasting trends of migratory waterbirds in the Wadden Sea. Wadden Sea Ecosystem No. 27. Common Wadden Sea Secretariat, Trilateral Monitoring and Assessment Group, Joint Monitoring Group of Migratory Birds in the Wadden Sea, Wilhelmshaven, Germany. Download in high text and high picture quality (12Mb) or  Download in hight text and low picture quality (1Mb).
No. 25	QSR 2009: Thematic Report No. 19: Migratory Birds Download (PDF, 0.7MB)
No. 23	Seriously Declining Trends in Waterbirds. Causes-concerns. consequences. International Workshop, August 2006 Direct Download (PDF, 3.5 MB)
No. 20	Migratory Waterbirds in the Wadden Sea 1980-2000. Direct Download (PDF, 2.3 MB)
No. 19	QSR 2004: Chapter 12.2: Migratory Birds Download (PDF, 2.5 MB, together with breeding bird chapter)

Breeding Birds

Trends:
	Breeding Bird Trends until 2008
Wadden Sea Ecosystem Reports:
No. 25	QSR 2009: Thematic Report No. 18: Breeding Birds Download (PDF,0.3 MB)
No. 22	Breeding Birds in the Wadden Sea in 2001. Results of the total survey in 2001 and trends in numbers between 1991 - 2001 Download (PDF, 4.6 MB)
No. 19	QSR 2004: Chapter 12.1: Breeding Birds Download (PDF, 2.5 MB, together with migratory bird chapter)
No. 10	Breeding Birds in the Wadden Sea in 1996. Results of a total survey in 1996 and numbers of colony breeding species between 1991 and 1996 Direct Download (PDF, 4.5 MB)
Other Documents:
	Monitoring Breeding Success of Coastal Breeding Birds in the Wadden Sea - Methodological Guidelines and Field Work Manual, Second version, April 2011 Kees Koffijberg, Stefan Schrader & Veit Hennig on behalf of Joint Monitoring Group for Breeding Birds (JMBB) Joint Monitoring Download (PDF, 6MB)