When we moved in, about 3 months ago, there was a 20l bin full of birdseed, left by the previous owners (along with a note requesting that we feed the birds).
There is a feeding station/table thing opposite the kitchen window.
The bin is nearly empty. 20l in about 3 months.
We get sparrows, chaffinches, Redwings, starlings, blackbirds, greenfinches, goldfinches and coaltits (that I've identified so far). A few lazy pigeons as well.