|ring area||The Netherlands, SW Delta, IJsselmeer area and Wadden Sea|
|observations||93, of which 29 are captures|
From 2020, five species of pioneer coastal breeding birds receive color rings in the Delta, IJsselmeer area and Wadden Sea to better visualize the movements and to determine survival. It concerns the following species: Avocet, Kentish plover, Ringed plover, Common tern and Little tern. Both adults and large young are ringed.