Build a Grackle-Proof Bird Feeder

Does the great grackle beset your bird feeder? This weight-activated feeder will shut out such heavy birds and squirrels as well.

grackle proof bird feeder - front view
This bird feeder is for lighter weight breeds — anything up to a cardinal. Any time a critter as heavy as a grackle lands on the perch, a door falls, closing off the feed.
Photo by Rory Orgill