Figure 1. (a) Mean and standard deviation of three representative dewlap phenotypes. The area under the curve of each spectrum was normalized to one prior to averaging. Representative dewlap spectra per population can be found in Figure S4. (b) Results of a PCA for dewlap reflectance for all individuals. Spectral data for each dewlap position (P1, P2, P3) were included as separate variables divided into 10-nm intervals, resulting in 123 variables. Photos of lizards with their dewlaps extended represent the color variation along each PC axis. High values of PC1 correspond to relatively bright dewlaps, whereas low PC1 values correspond to dull dewlaps. As for PC2, high values correspond to red dewlaps and low values correspond to yellow ones. The shading of points corresponds to the proportion of Western Cuba ancestry inferred from the K = 2 STRUCTURE results (see Figure S5).