This unassuming Backyard Boys Platform Feeder was popular when I used it in my yard. It is simply a screened tray on legs. Its frame and legs are made from recycled materials rather than wood, so it will last out in the elements far longer than one made of wood. It’s simple to fill, simple to clean and popular with many ground feeding birds. There are some down-sides to this type of feeder, but you can get around some of them. The trick is finding the right spot for it in your yard.
To get American Goldfinches to your feeders, you’ve got to treat them right! These beautiful little birds will eat sunflower hearts like many other backyard birds. But their favorite food is nyjer seed (sometimes known as “thistle” even though it really isn’t.) To serve nyjer, you need the right feeders. I have four Aspects Quick-Clean Nyjer Feeders I like very much. Here is a review.