This ideo is called Brent geese (Branta bernicla) grazing on grassland.
Translated from BirdLife in the Netherlands:
Jan 26, 2016 – Brent geese preferably eat non salty salt marsh plants. Salty plants are avoided. The protein content of the plant apparently leaves the birds cold. That concludes PhD researcher Wimke Fokkema based on measurements of plants in the marshes of Schiermonnikoog island. The research is published this month in the journal Oikos.
Pingback: Brent geese bathing, video | Dear Kitty. Some blog
Pingback: Shelduck drives away brent geese, video | Dear Kitty. Some blog