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Index of Subjects Hi, I just want to add that I have seen this tapping behaviour done by a number of shorebirds species (here and oversea). Lapwings, a variety of plover species (semi-palmated, common, kentish, golden). Noticeably all have relatively short bills and feed more from the surface than do deep probing in the mud. A few years ago a Herring Gull did the little dance on sand beach on Hearn Island, in the zone where water and sand form a semi fluid phase. I went to check what it was flushing out, and it turned out to be sand eels. The strategy seems to work for several species, espcl. as :Lance pointed out in a muddy environment. Ulli > Hi everyone, > > Another species known toexhibit this behaviouris theBlack-bellied > Plover which uses a rapid foot movement on the tidal mudflats to > stimulate mud-dwelling worms/polychaetes (e.g. Glycera sp. = > bloodworm) to come to the surface.
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