Abstract
Shelducks, Oystercatchers, Grey Plovers, Knots, Dunlins, Bar-tailed Godwits, Curlews, Spotted Redshanks, Redshanks, and Greenshanks showed a tidal rhythm of time-activity budgets on the Wadden Sea coast during the non-breeding season. Ringed Plovers and Ruffs did not react to the tidal rhythm. Night-time feeding could be observed in most species. Differences in the time-activity budgets of the species were related to body mass and size of food particles. Inter-site comparisons revealed that technical constructions for coastal protection influenced the activity rhythms of the birds.
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