Wild Birds Unlimited - East Lansing has a caged squirrel/blackbird proof suet feeder that limits the access to only small birds and birds that can feed upside down like woodpeckers, chickadees, nuthatches, and titmice. The 1 inch-diameter cage keeps out squirrels and blackbirds. Springs hold the top down so squirrels can't lift it open while the smaller woodpeckers, as well as chickadees and nuthatches, can easily fit through the mesh to dine on the suet inside. It holds up to three suet cakes.
There is also the upside down suet feeder that deters starlings and blackbirds because they cannot hang upside down. The feeder is designed to allow birds to feed from below, a comfortable practice for woodpeckers, nuthatches, chickadees and other clinging birds but difficult for starlings. Not only will it help you control your starling population, but it's also easy to refill, clean and hang.
Or we have a chain called the Starling Stumper that you can attach to your existing suet feeder. This is a quick fix to keep the voracious birds from eating all your suet! Leave the plastic container on the suet and place it in the cage. Attach the three 6" chains to the cage so only birds that can cling to the base of the cage can feed.
Thank you. I knew if I asked the right question you could solve my problem. Wild Birds Unlimited thinks of everything.