20cm length. Providing your bird with perches of various types and diameters is absolutely essential. Your bird will spend most of his life standing, so preventing foot problems is very important. Perches of different types and diameters help to exercise your bird’s feet so he won’t get tired of standing on same-sized perches of the same material. Perches will also help your bird navigate his cage and have comfortable places to sleep and spend his time. Therapeutic perches help trim your bird’s nails and may lead to a reduced need for nail trimmings. Try to place one as the highest perch in the cage or near your bird’s favorite food dish–this will help make sure it gets used.