An ingenious design feature of this feeder allows you to closely watch feeding birds without startling them! Use its extra-strong suction cups to securely attach this double-decked feeder to a screenless window. Not only will its durable, crystal-clear, polycarbonate construction provide you with unobstructed views of the festivities, but its one-way mirror prevents birds from peering out while you get a closer look inside. The easily accessed refill port means you won't have any trouble quickly replenishing the feeder with up to 1 lb of mixed seed. A stay-dry seed-storage system and retractable feeding trays with drain holes help to preserve and protect seed. (12½"h, 8"w, 3¼"d)