Don't you envy the freedom of birds, that they can fly without mechanical assistance? And no ticket needed!

I have bird feeders in my yard to feed the tiny little birds that fly about, especially this time of year when it's really cold. The problem I am having is that there are alot of crow / black birds in our area and they are absolutely relentless when it comes to the bird feeders. I really don't care for these black birds at all. They eat or destroy all the food for the little birds in a short amount of time. Does any one have a sensible solution to this bird problem, besides shooting the black birds. We have plenty of woods and fields for these black birds to hang out in....Not my bird feeders!

We don't have a bird feeder, or birdboxes. but recently there have been several species of birds coming to nest in our window sills (we have a wall of a bunch of windows, and now there at 3 birds nests in them) also, birds will continuously throw themselves up against the glass. i woudn't be so freaked, but the birds are all diffrent kinds. as i write this now i am listening to two diffrent birds throw themselves against a window. I don't mind this...it just strikes me as odd. and it has never happened before in all of the years i've lived here. anyone have any answers?