It could be a Ringed Plover, a Little Plover, a Kentish Plover
or several others.
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Ringed plover, little ringed plover, kentish plover, turnstone.
Dotterel does not have distinct black bands but is probably the
best match to reddish brown. DOTTEREL
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Many bird species are seen in
Germany including the king elder. The Kentish plover is another
bird species seen in Germany.