a cover for a selective type bird feeder , the cover having at least one downwardly extending wall with a protrusion formed on an inwardly facing surface of the downwardly extending wall and a side wall of a shroud or feed tube having a keyway to permit entry of the protrusion , and a biasing member to bias the cover upwardly . the cover arrangement provides for easy removal and replacement while permitting access to the inside of the feed tube .