For customers who are sick and tired of watching squirrels ruin the bird-watching party  the Absolute II Squirrel-Proof Bird Feeder from Heritage Farms is the answer to your prayers Taking a page from slapstick comedy  the Absolute II has a weight-sensitive perch that gives way when something heavier than a bird tries to eat the seeds  trapdoor-style! The perch weight sensitivity is even adjustable  so you can set it to trigger if unwanted larger birds try to break up the fun