Table 2. Colour differentiation (∆S) among females of T. r.
ruficapillus and T. r. cochabambae , and among males of T.
r. ruficapillus and T. r. cochabambae . ∆S represents relative
chromatic perceptual distance between females of the two subspecies
analyzed and between males of the two subspecies analyzed for each
plumage patch. Values are geometric means (and 95% confidence
intervals) for all comparisons. The unit of ∆S is jnd (just noticeable
differences). Values above 1.0 jnd, the theoretical threshold for colour
discrimination, are underlined. The PERMANOVA results were statistically
not significant in all comparisons.