Northern bald ibis  (Geronticus eremita)

The northern bald ibis has undergone a long-term decline over the centuries and is today Critically Endangered (5). Adults have a bare head and neck, which are red in colour apart from a black crown (2). Blueish-purple feathers cover the rest of the body and are long and glossy with a metallic green hue (2). The upper wing-coverts are a glossy purple-red and the long curved beak is also red (2). Juveniles have a dark (although not glossy) appearance and have grey feathers on their heads (2).