[allerleirauh]

Hello Summer ,
don`t be sad, i am sure the birds will come.. They have first to learn to know your feeding place. And if you offer them a variety of different food.. you can be sure they will come and then also return. It takes just a little bit patience.. :-) . i do not think that crow or magpies are a problem.. mostly the real problem are cats. So, birds are of course very careful in the first time.
By the way, I offer "my" birds also oat-flakes, fried in oil, most of the gardenbirds love them. I do not give any vegetable or fruits, it is freezing and then not anymore to eat for birds. IN the cold months they mainly need fat and proteins.
The open fields should not be a bigger problem, in my opinion. Here a lot of birds are coming down from the mountains and also from the forrests, when it is getting too cold and they fly often far distances over open land
so...just wait and see, the winter just started :-)