Birds love to swing!
Similar to the motion of sitting in the trees in the wind. Swings are good exercise, and good for your birds mental health too. Activities that simulate their natural state are great for their well being.
Small swings are about 3 1/4" wide x 5" tall and are perfect for finches and smaller canaries
Medium swings are 4 1/2" wide x 9" tall and are perfect for parakeets, love birds and similar sized species.
Large swings are 5 3/4" wide x 11 1/4" tall and should accomodate most hookbills.