They are a source of enjoyment, body exercise and fitness, practicing balance, foot movement, and just plain something to keep your bird entertained. Swings are more than a nicety, they help your bird keep fit and healthy and help him burn off those extra calories. The movement of a swing exercises the feet and strengthens the leg muscles, helping to prevent arthritis. Balancing on a moving swing also requires use of the chest and wing muscles, areas which need exercise as well. Playing on a swing stretches and tones muscles all over the body.
Birds enjoy the movement of swings, perhaps because they resemble branches swaying in the wind.
Or perhaps because they provide an opportunity to feel the air passing over their bodies, as when in flight. Whatever the reasons, birds like to play on swings and seem to derive much enjoyment from them. You can provide a bird a variety of swings, both in and out of the cage. Hang one in the cage and try a few different types on their gyms and playgrounds. There are a wide variety of shapes, sizes and designs to choose from.