Check the listing for details. Perky-Pet Squirrel Stumper Wild Bird Feeder - Keep Squirrels No Size, Copper. Color: copper, Condition: New. Listed at 37.07 USD. First, there’s the twist-lock lid, which not only removes for easy filling, but also locks in place so sneaky squirrels can’t easily open the wild bird feeder and steal seed from the top. In addition to its squirrel-resistant features, the 114B copper Squirrel Stumper is also a favorite of birds.