These pic of Nim was taken today to have a clearer look at his tail length after the 2nd molt. His longest black tail feathers before this molt was measured to be 10.5 inches. They are now estimated to be at least 11.5 inches. The tail feathers of a young white-rumped shama will increase in length after each molt, up to its 4th molt. There must be sufficient protein in its diet to enable the tail feathers to grow to its genetically determined maximum length.