Feeder for small birds. Small birds will surely enjoy a few suet balls or fat balls, especially when served in a hanging holder. This way, the little birds can access their food, and larger birds can't fly off with the treats. The suet ball holder accommodates three balls, and it's easy to see when it's time to refill. Simply remove the black top part to refill. It can be easily attached with a string, for example, to a tree or an overhang in front of a window, allowing you to watch the birds.