| plumage carotenoids of the pin-tailed manakin (ilicura militaris): evidence for the endogenous production of rhodoxanthin from a colour variant. | the pin-tailed manakin (ilicura militaris) is a small, sexually dimorphic, frugivorous suboscine songbird (pipridae; passeriformes; aves) endemic to the atlantic forest of brazil. a variant individual of this species was recently described in which the red patches that characterise the male's definitive plumage were replaced by orange-yellow ones. we show here that the pigments in the feathers of the colour variant are common dietary carotenoids (zeaxanthin, beta-cryptoxanthin), not carotenoids ... | 2007 | 17400013 |