Feeders attract. Birds swarm in and swarm out, snatching and ingesting the seeds that fill the feeders. Young sparrows fly from the branches of bushes to grab their fill. Male cardinals tarry a while to show off their brilliant plumage. Red bellied woodpeckers throw back their heads to swallow their seeds. Other birds - red breasted grosbeak, finches, mourning doves. purple martin, and gray catbird - add to the array of winged delights outside my bedroom window.