Droll Yankee Whipper Bird FeederDroll Yankee Whipper Bird Feeder Keep squirrels away from your bird feeder and save seed! The 5 pound capacity Droll Yankees Yankee Whipper Bird Feeder is a weight sensitive collapsing curved perch feeder that supports birds and not squirrels. It allows the birds to eat and saves seed by keeping squirrels away. When a squirrel grabs onto the perches, they collapse and the squirrel goes flying. Squirrel proof design Holds up to 5 lbs. of bird seed A