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Article
Romke Kleefstra, Auteur ; Hans Schekkerman, AuteurThe Curlew Sandpiper Calidris ferruginea is a scarce species in the Dutch Wadden Sea, with short migration peaks during spring (May) and autumn (July–September). Due to these short peaks, the regular monthly counts of waders on high tide roosts [...]
Article
Karsten Laursen, Auteur ; Thomas Bregnballe, Auteur ; Romke Kleefstra, Auteur ; John Frikke, Auteur ; Klaus Günther, Auteur ; Menno Hornman, Auteur ; Claus L. Pedersen, Auteur ; Jan Blew, Auteur ; Anders Pape Møller, AuteurRegime shifts are likely to have strong impacts on all trophic levels and their interactions. In addition, weather conditions and sea level rise together with tidal currents may change sediment morphology in coastal areas and estuaries. Here, we[...]
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Jimmy De Fouw, Auteur ; Andrew W. Thorpe, Auteur ; Roeland A. Bom, Auteur ; Steven de Bie, Auteur ; Kees Camphuysen, Auteur ; Brian Etheridge, Auteur ; Ward Hagemeijer, Auteur ; Lenze Hofstee, Auteur ; Theo Jager, Auteur ; Leon Kelder, Auteur ; Romke Kleefstra, Auteur ; Marcel Kersten, Auteur ; Szabolcs Nagy, Auteur ; Raymond H. G. Klaassen, AuteurBarr Al Hikman, a large intact coastal wetland in the Sultanate of Oman, is an important wintering site for migratory waterbirds in the Asian-East African Flyway. The last reported systematic survey of the area is from 1990. Here, we present res[...]
Article
Arend J. van Dijk, Auteur ; Michiel van der Weide, Auteur ; Romke Kleefstra, Auteur ; Dirk Zoetebier, Auteur ; Calijn Plate, AuteurDans Limosa (75(3) 2002)In The Netherlands, annual surveys of rare and colonial breeding birds are carried out since 1992. These aim to monitor national population size and population developments in Special Protection Areas (SPAs). This paper presents the results of t[...]
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Romke Kleefstra, Auteur ; Appie Bles, AuteurDans Limosa (73(4) 2000)During breeding bird surveys in two peat bog areas in the province of Friesland in 2000, two pairs of Greylag Geese were found nesting in birch trees. Both nests were built at an altitude of about 9 m, in nests formerly used by Buzzard and Gosha[...]
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Ingrid Tulp, Auteur ; Romke Kleefstra, AuteurDans Limosa (87(4) 2014)
Article
Romke Kleefstra, AuteurDans Limosa (78(3) 2005)The breeding success of a small population of Purple Herons was studied in 2001-05 in a peat swamp in central Friesland, The Netherlands. The regular clutch size was 4-5 eggs. However, in 2004 and 2005, single clutches of respectively 9 and 13 e[...]
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Romke Kleefstra, Auteur ; Marc van Roomen, Auteur ; Erik van Winden, Auteur ; Dirk Tanger, AuteurDans Limosa (87(1) 2014)Countrywide counts of Golden Plovers in the Netherlands in autumn show a decrease since the mid-seventies from a total of 400,000 in 1976 and 1978 to 214,000 in 2008. The trend based on the national waterbird monitoring program shows the opposit[...]
Article
Romke Kleefstra, AuteurDans Limosa (87(4) 2014)The first breeding pair of Barnacle Goose in National Park Oude Venen, in the Dutch province of Friesland, settled in 1999 (Fig. 3). From 2005 onwards the colony on a small island has been surveyed to monitor the number of breeding pairs and ass[...]
