With beautifully defined blocks of colour, the red-breasted goose (Branta ruficollis) is one of the most attractive goose species in the world, but also one of the rarest. The fore-neck, breast and sides of the head are chestnut red bordered with white. The wings, back and fore-belly are charcoal black, with a bright white stripe running down the side to the white rear belly. The short neck and dark belly stand out in flight, and when seen from above two crescent-shaped stripes are visible on each wing. Juveniles are less well defined, and duller in colour. Adults make repeated ‘kik-yoik, kik-yik’ sounds in flight.