7. The Weight-Activated Seed Gate Feeder

This more advanced design uses a weighted perch or gate system that closes feeding ports when a heavy animal, such as a squirrel, lands on the feeder.

Why It Works

Birds weigh far less than squirrels and do not trigger the closing mechanism. When a squirrel attempts to feed, its weight shuts access to seed.

Materials Needed

  • Lightweight feeder housing
  • Springs or hinges
  • Small metal plates or washers
  • Perch rods

How to Build

Attach a hinged seed cover or sliding gate over the feeding ports, connected to weighted perches. When excess weight is applied, the gate moves into place, blocking seed access.