Yankee Whipper The Yankee Whipper features curved perches that allow ergonomic positioning of cardinals where the bird comfortably face the seed port. Squirrels are exluded by virtue of their weight, temporarily collapsing the perches and causing them to harmlessly fall to the ground. The Yankee Whipper comes with a lifetime warranty from the manufacturer. One color: classic evening blue. Holds a generous 2.3 kg (5 lbs) of seed.