So, feeding them in Winter is important. The food supply from bushes and trees are much less in the Winter.
This year, I'm having my Girl Scout Troop make bird feeders out of pine cones.
Tie or glue a string, ribbon or yarn to the top of a pine cone.
After your cones are fully covered with peanut butter (you may wish to leave a little of the top part of the cone uncovered so the bird can sit on it while it eats) roll the cone in bird seed.
Just find out what kind of birds you have in your area and use the right kind (or make several cones with different kinds of seeds to attract different birds).
The birds will thank you.