The striking male Siamese fireback is most notable for its unusually long crest of purple-black feathers, which reaches up to 9 cm in length and becomes erect when the bird is excited (2) (3). The breast, neck and upper back are mostly grey with very fine vermiculations, and the belly and head are black with the head decorated with large scarlet-red facial wattles (2) (3). The name ‘fireback’ refers to the yellow plumage in the middle of the back, a feature shared with other firebacks (3). However, this species can be distinguished by its characteristic pattern of metallic blue with coppery-crimson fringes on the lower back, together with its red legs and long, curved tail, which is black with a metallic blue-green sheen (3) (4). The female is also quite distinct from other Lophura hens, most noticeably in having black upper wing and central tail feathers, boldly barred with buffy-white (4). The plumage is otherwise mostly bright chestnut-red and the head is greyish-brown with smaller red facial wattles than the male and no visible crest (2) (3).
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