H. von Ihering and R. von Ihering, 1907,
Iguapé, São Paulo, Brazil, and Buenos Aires; Argentina.
Usually treated as a race of S. melanotos. Occasional treatment as full species (most recently in a 2005 monograph#R) justifiable on basis of slightly smaller size (mean male wing 336 vs 360, mean male bill 56 vs 62) (allow 1); glossy blackish-grey vs matt greyish-white flanks (3); glossy blackish-grey vs matt greyish-white back and rump (extension of flanks, but notable in flight and wing-flapping; score 1); fully developed comb proportionately different, rising more at right angles from forehead and usually curving over more smoothly, forming disc-shape more than sail-shape, whereas in melanotos it rises at a forward angle in a longer straight line, curving at apex more sharply, so that surface area is larger and leading edge forms a longer vertical (2). Studies of voice and behaviour to supplement these distinctions needed. Proposed race carunculatus is invalid. Monotypic.
Tropical South America from Colombia, Venezuela and the Guianas S to N Argentina and Uruguay. Rare breeder in E Panama.
Food and feeding
Status and conservation
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