Weight-Activated Feeders: How They Work
Drs. Foster & Smith Educational Staff

Weight-activated Feeders: How Do They Work?

Weight-sensitive feeders are some of the most successful squirrel-proof feeders available. Here is how they work to stop a squirrel.
Squirrel Buster Classic Bird Feeder Squirrel-proof Birdseed Vault

Think of a metal spring. When we press on it with our finger, we eventually transfer enough force to cause it to compress. Weight-sensitive feeders like the Squirrel Buster Classic have spring-loaded perches. The perch’s spring is set to withstand a certain amount of weight; birds, even larger ones, are often too light to compress the spring. A squirrel's weight, however, is enough to compress the spring, which drops the perch and closes the seed ports.

Some weight-activated feeders, like the Original Absolute Feeder, let you adjust the starting tension of the spring. This changes the amount of weight required to compress the perch and close the seed access. You get to decide which birds feed, from just the smallest birds to those just a little lighter than a squirrel.

These feeders make it easy for you to stay one step ahead of thieving squirrels. They require no special assembly, and they are some of the most technologically advanced on the market. Try a weight-activated feeder yourself, and watch squirrels go away frustrated.

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