Squirrels may not like Nyjer seed very much but if you feeder a finch mix or straight Fine Sunflower Chips, this feeder is a real asset. This truly squirrel-proof feeder features 8 ports in a polycarbonate tube that is covered by a metal wire cage. The length of the feeder makes it impossible for squirrels to get to the seed without causing the spring loaded cage to slide down and cover the food ports. It is also effective against larger blackbird species. It is super easy to take apart for cleaning and holds 1.4 qts of seed.