The Absolute squirrel-proof bird feeder is one of the original squirrel-proof bird feeders, and is a great design. It is all metal which prevents the squirrel from chewing through it. Its trapdoor design is weight-sensitive, so when the squilrrel puts his weight on the perch, the “door” shuts off access to the seed.
The weight sensitivity is adjustable, so you can set it to shut off seed for heavier birds such as crows and grackles, of you wish. And it is very rugged and solid. The lid comes off for easy filling. And it is all metal, so should last for years.
Here is an interesting piece of trivia: my birding friend (the same one who used soda bottles as a squirrel block) had a homemade version of this feeder. Her dad had made it for her more than 40 years ago. Too bad he didn’t market it!
Here’s where you can get it online:
Duncraft
The Bird Shed
Yardiac
Maybe this isn’t the safest feeder for critters. Here’s someone who found a chipmunk lodged in it! He finally got out, but here’s a video of the struggles to free him.
http://isobardave.wordpress.com/2007/06/01/chipmunk-injures-lower-back/
once the squirrels learn how to overcome thus style of feeder they offer zero protection.
They simply hang from the roof and eat the food.
I extended the roof with some sheet metal.
Then they hung from the ‘hinge’ of the perch and reach up to get the food.
I covered the hinged with sheet metal,
Now they hang from the the support pivots and reach up and get he food.
Their abs must be really strong now.