1cy October. Juvenile RR are generally slightly more narrow and more pointed than in adult, but there is a variation in shape and difficult birds are sometimes seen. The structure is often helpful: less dense, less glossy and somewhat paler brownish than post-juvenile (or post-breeding) feathers. Most birds include no RR in the post-juvenile moult, but occasionally single RR (often only the central R1) may be included. [Specimen]