Here in South East Indiana the snow has covered the ground for weeks now. The birds are struggling to find enough food. Help them out by putting out feed. Most retail stores and farm feed stores sell wild bird seeds. I put out feed all Winter, but it is very important when the ground is covered with snow. Save your table scraps and put it out on the ground near the base of a tree or bush. Crows love table scraps but so do stray cats and dogs, They must eat to.
Read more Do a search for feeding birds