river birds in mase along river delta channels

animal ardea area areas aviary biesbosch biodiversity birds boat boating channel channels cloud consists cross cruise delta dutch ecological egret environment europe extensive forest freshwater grey hedge heron holland lake landmark landscape largest last marsh mase national natural nature netherlands northwestern one park parks pasttime pond protected recreation reflection reserve reservoir river scenery scenic sea ship shore skies summer surface tidal travel tree trees trip vacation vegetation vehicle water waterscape waterway wetland wetlands wild wildlife