We see one or two Grosbeaks a year, and never two at once. Our heavy populations are downy woodpeckers, all manners of finches, especially goldfinches, blue jays, and sparrows. We have a lot of mockingbirds around, but they don't come to the feeder. There is one mockingbird I've seen and heard for two years now. He's learned to copy the neighbor's phone, so when I work in the yard I occasionally hear a phone ringing in the woods.
We feed through the end of May. We used to end earlier, but we get a lot of fledglings this month so we now leave it up for the "Nature Babies" show.