Fig. 4 | Nature Communications

Fig. 4

From: Structural absorption by barbule microstructures of super black bird of paradise feathers

Fig. 4

Ray-tracing simulations. a Simulation from FRED showing the trace of a ray that scatters multiple times between barbules of a super black feather. b Substantial variation in frequency of multiple scattering events among species predicts variation in structural absorption. c Measured reflectance is significantly negatively correlated with the proportion of reflected rays that scattered at least twice (linear regression: R 2 = 0.68, slope = −0.063, SE = 0.021, and P < 0.05)

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