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. 2017 Dec 26;115(2):E218–E225. doi: 10.1073/pnas.1717319115

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Fig. 3. — (Left) Percentage of reflectance (90° and 45° to feather). Percentage of reflectance is show before (red trace) and after (blue trace) carotenoid extraction in L. vilasboasi. Reflectance curves and their SEs are taken from five measures of two stacked feathers. (Center) Transmission electron micrographs (TEMs) of the barb cortex and keratin spongy layer of male crown patch. (Scale bars: 1 µm.) (Right) Crown patch photographs for three species of Lepidothrix and an F1-like L. nattereri × L. iris hybrid.