Facebook post by University of Helsinki

Deep snow cover increases the number of wintering birds near human settlements but reduces numbers in arable fields. Deeper snow cover prevents birds from foraging in fields, and supplementary feeding in settlements provides an important food source for wintering birds.
Snow conditions influence the choice of habitat for wintering birds | University of Helsinki www.helsinki.fi

Deep snow cover increases the number of wintering birds near human settlements but reduces numbers in arable fields, according to a new study at the University of Helsinki.