This window feeder is excellent for any Birder. The clear plastic makes it easy to see when a refill is needed. The seed tray is removable, making it absolutely painless to fill and clean. With a barrier in the seed tray, Birders can feed two seed options! The pitched roof keeps our feathered friends and their snacks clean and dry. Perfect for sunflower, safflower, and mixed seed blends, this feeder is a must have. The four included suction cups make sure that the feeder won't fall with the weight of our feathered friends!