|ring area||The Netherlands, SW Delta, IJsselmeer area and Wadden Sea|
|observations||32, of which 29 are captures|
From 2020, four species of pioneer coastal breeding birds will 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 and Common tern. Both adults and large young are ringed.