There are valid reasons to, as you can read below, but I think summer feeding is the most fun. The variety of birds you can feed in the summer is more challenging to attract and so the rewards are greater. The hummers are favorites. I found that by hanging the feeder on string from a cup hook in the overhang, I could position it precisely where I wanted it, just inches from a fuchsia, so that the hummers HAD to discover it. Try a fruit feeder with oranges or apples for orioles and mockingbirds.
Mealworms appeal to bluebirds, chickadees, thrashers, and more.
And then you'll also have some summer seed eaters that you might not have seen otherwise, like rose breasted grosbeaks or indigo buntings, depending on your area. And no matter where you are, you'll see babies lined up by the feeder, getting fed by parent birds. Droll Yankee bird basics. An informative introduction to bird feeding . They also eat a variety of different seeds in nature, some providing nutrients not found in commercial birdseed.