Panning drone shot follows a large flock of birds flying above the wet and lush farmlands of a river delta in the Netherlands

netherlands dutch south holland drone aerial farm field agriculture countryside summer landscape outdoors green agricultural rural farmland land plant grass day scenic beautiful fertile meadow environment industry organic pasture fresh spring animals water lush wetlands flying birds wildlife flock migration rhinemeusescheldt delta river delta reeds marsh marshland river waterway polder dike hydrology