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The distribution and phenology of the nominate sub-species of Black-tailed Godwit

D. Kleijn & D. Lammertsma. Alterra, Wageningen UR, The Netherlands.

Page under construction

Effective conservation depends on how well we know where and when Black-tailed Godwits occur in their flyway. This is crucial information if we want to take conservation measures at the right place and time. Although this information is available in general (e.g. Kuijper et al. 2006, Lourenço & Piersma 2008), much of the detail is lacking. This makes it difficult for conservationists in individual countries to target conservation efforts to the right place and time. In an attempt to address this knowledge gap, a  gap-filling survey of non-breeding Black-tailed Godwit observations was carried out. This survey focussed on the nominate species Limosa limosa limosa. On this website a short overview is given of the main results. A full list with all sites in which Black-tailed Godwits have been observed is given elsewhere on this website. Due to data-ownership issues this information is only accessible to members of the Working Group of the Black-tailed godwit Single Species Action Plan.

Data from existing databases (mainly the International Waterbird Census (IWC) database) were combined with observations in published papers, grey literature and from acknowledged ornithologists throughout the godwit flyway that were contacted by email. Data were collected until August 2012. Black-tailed Godwits were observed in almost 2000 different sites and the total number of observations was 13,331. Although this is an impressive number by itself, it is actually not much considering the large size of the flyway and the fact that a large proportion comes from a small number of North-western European countries.

A number of standard problems with presenting data from unplanned observations apply to the figures presented below. In the next section we briefly discuss the most important ones.

Things to bear in mind when interpreting the distributional and phenological maps and tables

• In certain parts of the year and flyway range, the distribution of the two subspecies overlap and it is generally impossible to reliably separate the two subspecies in the field. Furthermore, the IWC database does not make a distinction between the nominate form L. l. limosa and Icelandic subspecies L. l. islandica. Depending on the time of year, data for the Netherlands, Belgium, France, Spain, Portugal and Morocco include counts of the Icelandic population. Data from Ireland and Great Britain probably exclusively exist of observations of the Icelandic Black-tailed Godwit but, for consistency, we decided to include them nevertheless.
• To a large extent the distributional maps are determined by observational effort. For example, few Black-tailed Godwits were observed in the eastern part of Africa (e.g. Egypt, Soudan, South Soudan, Ethiopia, Kenya). It is unlikely that this area isn’t used by large numbers of staging and wintering Black-tailed Godwits from the Eastern European breeding population. It most likely reflects that not many people have gone looking for this species in that part of the flyway.
• There is a strong bias towards observations around the mid-winter period. Sixty-three per cent of the counts were made in the months December-February. This is largely the result from the large proportion of database originating from the IWC mid-winter count.
• There is large variation in years in which the observations were made. For example, a large proportion of the impressive dataset from Iran was collected in the 1960s and 70’s. We do not know whether the numbers and distribution described by that dataset are representative for the situation today. On the other hand, all data from the Ukraine were collected in 2010.

The data indicate clearly that, outside the breeding season, the Black-tailed Godwit is an aggregative species that tends to concentrate in large numbers in a limited number of sites. More than half of all observations consists of groups of up to 50 Black-tailed Godwits (Fig.1). Nevertheless, sites in which 500 or more Black-tailed Godwits were observed simultaneously accounted for 84% of all observed Black-tailed Godwits suggesting that such are of particular importance. This result is apparently not biased by bird watchers preferentially visiting sites holding the largest number of birds. In Morocco a long-term annual survey is being carried out that covers a large number of sites with a range of apparent suitability for Black-tailed Godwits. The data from these surveys produced a very similar result (Fig. 1). It therefore seems to be a realistic pattern. Table 1 lists the top 20 sites with the highest average number of observations. Many of these sites have been well-known for a long time to be important Black-tailed Godwit staging sites.

Figure 1.
The frequency distribution of the number of Black-tailed Godwits that are observed per site in individual counts. Top-panel, all 1813 sites; bottom panel, just the sites in Morocco, a country with an annual census covering a wide range of habitats.

Figure 2. Year round observations of Black-tailed Godwits throughout the flyway.

Figure 2 gives an overview of the year-round observations of Black-tailed Godwits throughout the flyway. The most obvious wintering and staging locations seem to the Iberian Peninsula, the West-African coast and the Sahel zone in the western part of the flyway and the delta of the Tigris and Euphrate rivers, the Iranian Caspian Sea coast in the eastern part of the flyway. Wetlands all along the Mediterranean coast host smaller numbers of Black-tailed godwits, mostly during spring or fall migration (ref figs?). Interestingly, even during the breeding season Black-tailed godwits are being observed in Africa (ref fig?), suggesting that these wetlands are important throughout the year. No separation between the Islandic and nominate subspecies was made because the IWC database did not contain information on the subspecies level. The importance of specific staging and wintering sites is given for the total database and per season. Dots represent the average maximum count /year/site. The top 20 of most important sites are:

Table 1.
The top 20 of the sites with the largest numbers of Black-tailed Godwits. Numbers indicate the between-year average of the within-year maximum of bird observations.


Country Site name Average maximum count
Oman Barr al Hikman 34000
Portugal Estuário do Tejo 20041
Mali Debo 16418
Portugal Samora Correia 14741
Cameroon Bas Chari (Cameroun) 13226
Spain Veta La Palma (SE) 11979
Burkina Faso Lake Oursi-Lake Darkoye 11713
Spain Arrozales de Puebla y Villafranco (SE) 9418
Romania Razim-Sinoie lagoon 9075
Spain Regadíos de Palazuelos 9026
Cameroon Lac Tchad - quadrat 100 8770
Spain Reserva del Guadiamar (H) 8328
Ukraine Sivash 8316
Mali Lac Walado Debo 8269
Spain De la Algaida a Hato Villa (H) 6458
Morocco MerjaZerga_Lagoon 6425
Morocco Merja Zerga: Kenitra 5860
Spain Regadíos de Vegas Altas (BA) 5687
Chad Bas Chari (Tchad) 5523
Spain Caño del Guadiamar PND (H) 5502













In order to specify the phenology of migration in Black-tailed Godwits histograms are presented per country (average count/year/month).  These figures show the available information on abundance per country and indicate research gaps for specific months and countries. In total 273 specific country-month counts are presented. Half of the data is based on 1 count and showing the strong focus on mid-winter


Carrying out bird surveys is a time-consuming and therefore costly process. In spite of this many researchers and organizations have freely shared their data, thus making the construction of this dataset possible. We thank Wetlands International, Bernard Trolliet, Eddy Wymenga, Leo Zwarts, Pedro Lourenço, Antoni Marczewski, M. Fasola, Jelena Kralj, T. Mikuska,  Derek Scott, W. Meissner, Tommy Pedersen, Bob Woodcock, Bernhard Walter, Iris Charalambidou, Daan Bos, Imad Cherkaoui and Guy M. Kirwan. We thank Diedert Spijkerboer for obtaining much of the data and collating it into a single database.
We acknowledge http://www.worldbirds.org with databases and contributors to the Ornitorama, Awibaza, and AviCa websites.
Last but not least, we thank the many anonymous birders who took part in the surveys, and without whose efforts many of the data presented here could never have been collected.

This data compilation was sponsored by the Dutch Ministry of Economic Affairs, Agriculture and Innovation (BO-10-001-161).

Literature - A selection of the most important studies used to compile the database
Altenburg, W & J. van der Kamp 1985. Importance des zones humides de la Mauritanie du sud, du Senegal, de la Gambie et de la Guinee-Bissau pour la Barge a queue noire Limosa l. limosa). RIN contributions to research on management of natural resources 1985-1, Leersum.


Altenburg, W & J. van der Kamp 1986. Oiseaux déau dans les zones humides de la Mauritanie du sud, du Senegal et de la Guinee-Bissau; octobre-decembre 1983. RIN contributions to research on management of natural resources 1986-1, Leersum.

Altenburg, W. & J. van der Kamp 1991. Ornithological importance of coastal wetlands in Guinea. ICBP study report 47.

Bargiel, R., Wlodarczyk, R. & A. Kalinski 1998. Catching waders at the Jeziorsko reservoir( western Poland). Ring 20(1-2): 77-80.

Berk, V.M. van den, J.P. Cronau & T.M. van der Have 1993. Waterbirds in the Van province, Eastern Turkey, may 1989. WIWO-report 34, Zeist, the Netherlands.

Chalabi, B. & G. van Dijk 1988. Les zones humides dans la region de Annaba et el Kala en mai 1987. WIWO-report 24, Zeist, the Netherlands.

Delić, A. & D. Grlica 2003. Birds of the Končanica fish-ponds, Croatia. Nat. Croat. 12(2): 63-91

Dijk, A.J van, K. van Dijk, LJ. Dijksen, T.M. van Spanje & E. Wymenga 1986. Wintering waders and waterfowl in the gulf of Gabes, Tunisia, january-march 1984. WIWO-report 11, Zeist, the Netherlands.

Dijksen, L.J. & A. Blomert 1989. Midwinter waterfowl census Turkey 1989. WIWO-report 37, Zeist, the Netherlands.

Dijksen, L.J. & A. Blomert 1993. Midwinter waterfowl census Turkey 1990. WIWO-report 37, Zeist, the Netherlands.

Dijksen, L.J. & P. van der Wolf 1987. Mid-winter waterfowl census. Turkey january 1987. WIWO-report 18, Zeist, the Netherlands.

Eskelin, T. & S. Timonen  2010. Survey of Possible Lesser White-fronted Goose (Anser erythropus) Wintering Sites in the Syrian Arab Republic, 14-24 February 2010. AEWA Lesser White-fronted Goose International Working Group Report Series No. 1. Bonn, Germany.

Fasola, M., Biddau, L., Borghesio, L., Baccetti, N. & F. Spina 1993. Water bird populations at Lake Turkana, February 1992. In: Wilson, R.T. (ed.).  Birds and the African Environment.  Proceedings of the Eighth Pan-African Omithologica/ Congress. Annales Musée Roya/ de I'Afrique Centrale (Zoologie) 268: 529-532.

Ghaemi, R. 2006. Shorebirds of the wetland of Gomishan, Iran. Wader Study Group Bull. 109: 102–105.

Groen, N., J. Hooijmeijer & F. Mandema 2006. Migrating and staging Black-tailed Godwits in the Extremadura (Spain), february 2006. Animal Ecology Group, Groningen.

Hirschfeld, E. 1995. Birds in Bahrain.  A study viagra online generic of their migration pattems 1990-1992. Dubai: Hobby Publications, 124 pp.

Hustings, F. & K. van Dijk 1994. Bird census in the Kizilirmak  delta, Turkey, in spring 1992. WIWO-report 45, Zeist, the Netherlands.

Kamp, J. van der, D. Kleijn, I. Ndiaye, S.I. Sylla & L. Zwarts 2008. Rice farming and Black-tailed Godwits in the Casamance (Senegal). A&W –rapport 1080/ Alterra rapport 1614. Altenburg & Wymenga ecologisch onderzoek, Veenwouden/ Alterra, Wageningen.

Kasprzykowski Z., A. Goławski & C. Mitrus 2009. Observations of waterbirds on the Upper Euphrates during autumn migration. Observations of waterbirds on the Upper Euphrates During autumn migration. Ring 31: 79-84.

Kazantzidis, S., Vangeluwe, D., Handrinos, G., Pergantis, F., Schogolev, I. & Y. Roussopoulos 2009. The migration of waders (Aves, Charadrii) in Greece. Avocetta 33: 171-183.

Keijl, G.O., P.S. Ruiters, T.M. van der Have, A. bij de Vatte, E.C.L. Marteijn & R. Noordhuis 1998. Waders and other waterbirds in the United Arab Emirates autumn 1994 & spring 1995. WIWO-report 62, Zeist, the Netherlands.

Kivit, H., H. Nijmeijer & A. Ovaa 1994. Wade rand waterfowl migration in the Cukurova deltas, South Turkey, spring 1990. WIWO-report 48, Zeist, the Netherlands.

Kleijn, D., J. van der Kamp, H. Monteiro, I. Ndiaye, E. Wymenga & L. Zwarts 2010. Black-tailed Godwits in West African winter staging sites. Alterra report 2058, Wageningen

Kostiushyn V., Chernichko J., Goradze I., Mamuchadze J., Gokhelashvili R., Akarsu F., Chernichko R., Diadicheva E. & S. Vinokurova 2011. Results of the Autumn 2010 Migratory Waterbird Counts in the Azov-Black Sea Coastal Wetlands of Ukraine, Georgia and Turkey.- Wetlands International Black Sea Programme.

Kuijper, D.P.J., Wymenga, E., van der Kamp, J. & Tanger, D. (eds) 2006. Wintering areas and spring migration of the Black-tailed Godwit. Bottlenecks and protection along the migration route. A&W-rapport 820. Altenburg & Wymenga ecologisch onderzoek bv, Veenwouden.

Lourenço, P.M. & Piersma, T. 2008. Changes in the non-breeding distribution of Continental Black-tailed Godwits Limosa limosa limosa over 50 years: a synthesis of surveys. Wader Study Group Bulletin 115: 91-97.

Márquez-Ferrando, R., Hooijmeijer, J., Groen, N., Piersma, T. & Figuerola, J. 2011. Could Doñana, SW Spain,be an important wintering area for continental Black-tailed Godwits Limosa limosa limosa? Wader Study GroupBull. 118(2): 82–86.

Meininger, P.L. & G.A.M. Atta 1994. Ornithological studies in Egyptian wetlands 1989/90. WIWO-report 40, Zeist, the Netherlands.

Meininger, P.L. 1990. Birds of the wetlands in North-east Greece. WIWO-report 20, Zeist, the Netherlands.

Musil, P. & R. Fuchs, 1994: Changes in abundance of water birds species in southern Bohemia (Czech Republic) in the last 10 years. Hydrobiologia 279/280: 511-519

Schmitz, M., Sudfeldt, C., Legge, H., Mantel, K., Weber, P. & Marinov, M. 1999. Spring migration of waders in the Razim-Sinoie lagoon system south of the Danube Delta, Romania. Wader Study Group Bull. 90:59 – 64

Serra, L ., L. Casini, M. Della Toffola , A. Magnani , A. Meschini & R. Tinarelli 1992. Results of a survey on wader spring migration in Italy( March-May 1990). Wader Study Group Bull. 66: 54-60.

Spiekman, H.W., G.O. Keijl & P.S. Ruiters 1993. Waterbirds in the Kneiss area and other wetlands, Tunisia. Eastern Mediterranean Wader project spring 1990. WIWO-report 38, Zeist, the Netherlands.

Stipčević, M. 1997. A survey of spring wader migration on the wetlands of the island of Pag, Croatia (March-May 1990-1991). Wader Study Group Bull. 84: 26-32

Trolliet,B . & M. Fouquet 2004. Wintering waders in coastal Guinea. Wader Study Group Bull. 103:56-62.

Winden, A. van, K. Mostert, P. Ruiters, M. Siki & H. de Waard 1989. Waders and waterfowl in spring 1988 at Eber Gölü, Turkey. WIWO-report 28, Zeist, the Netherlands.

Winden, J. van der, E.A. Diadeicheva, W.T. Nobel & M.W.J. van Roomen 2001. Counts and ecology of waterbirds in the Sivash, Ukraine, august 1998. WIWO-report 71, Zeist, the Netherlands.

Young, H.G. F. Razafindrajao, R.E. Lewis & B.A.A. Iahia 2006. Distribution and status of paleartic shorebrids in Western Madagascar, septemeber-novmeber 2004. Waterbirds 29(2): 235-238.