I punched holes in the bottom of a disposable metal pie plate, wedged it into one of the crepe myrtle trees outside the kitchen window, and filled it with black oil sunflower seeds. Then I scattered seed all over the ground. So now that area is filled with juncos, titmice, chickadees, cardinals, and an occasional pair of finches. I have to refill the plate daily.
Being able to feed the birds again is the one, and only, advantage of not having Kitty around any more.
I've wondered - How do the birds sense that Ginger is not a threat, when Kitty was? (Two or three times a year we'd find feathers all over the garage, or worse, a partially-eaten gift at the back door.) Ginger can nap not five feet from the tree, and yet they seem oblivious to her.