<p>Self build by Ulrich Prokop (<a href="//commons.wikimedia.org/w/index.php?title=User:Scops&amp;action=edit&amp;redlink=1" class="new" title="User:Scops (page does not exist)">Scops</a> 08:22, 22 October 2005 (UTC))
using photo filtre
sources: maps by GROMS (www.groms.de); Beaman&amp;Madge p. 307;
Makatsch: Die Limikolen Europas einschließlich Nordafrikas und des Nahen Ostens. VEB Deutscher Landwirtschaftsverlag Berlin. 1986
</p>
Verbreitungsangaben im Handbuch der Vögel Mitteleuropas. Bd. 6/pp 286 ff
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CC BY 2.5
No machine-readable source provided. Own work assumed (based on copyright claims).