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Table 6 Plumage colour differences between polatzeki (N = 5) and teydea (N = 10) Blue Chaffinches

From: Species-level divergences in multiple functional traits between the two endemic subspecies of Blue Chaffinches Fringilla teydea in Canary Islands

Plumage patch Colour variable teydea polatzeki Test of difference between means Effect size (Cohens d)
Back Brightness 2.424 ± 0.190 2.082 ± 0.176 t 13  = 3.36, P = 0.005 1.98
Chroma 0.093 ± 0.010 0.091 ± 0.002 t 13  = 0.45, P = 0.66 0.26
Hue −1.045 ± 0.321 −1.103 ± 0.481 t 13  = 0.28, P = 0.78 0.17
PC1 1.992 ± 3.468 −3.985 ± 3.170 t 13  = 3.23, P = 0.007 1.90
PC2 −0.169 ± 1.426 0.338 ± 0.221 t 13  = −0.78, P = 0.45 −0.46
Crown Brightness 2.248 ± 0.159 2.056 ± 0.078 t 13  = 2.50, P = 0.026 1.48
Chroma 0.085 ± 0.015 0.076 ± 0.002 t 13  = 1.31, P = 0.21 0.77
Hue −0.555 ± 0.250 −0.681 ± 0.191 t 13  = 0.98, P = 0.34 0.58
PC1 1.574 ± 4.249 −3.149 ± 2.088 t 13  = 2.32, P = 0.037 1.36
PC2 −0.279 ± 1.595 0.559 ± 0.853 t 13  = -1.09, P = 0.30 −0.64
Rump Brightness 2.358 ± 0.152 2.147 ± 0.112 t 13  = 2.72, P = 0.018 1.61
Chroma 0.095 ± 0.009 0.102 ± 0.008 t 13  = −1.46, P = 0.17 −0.86
Hue −0.949 ± 0.691 −0.674 ± 1.154 t 13  = −0.58, P = 0.57 −0.34
PC1 1.691 ± 3.993 −3.382 ± 3.043 t 13  = 2.49, P = 0.027 1.46
PC2 0.420 ± 1.246 −0.839 ± 0.649 t 13  = 2.09, P = 0.056 1.23
Upper breast Brightness 2.896 ± 0.208 2.816 ± 0.201 t 13  = 0.71, P = 0.49 0.42
Chroma 0.143 ± 0.018 0.154 ± 0.011 t 13  = −1.22, P = 0.25 −0.73
Hue −0.033 ± 1.223 1.136 ± 0.513 t 13  = −2.02, P = 0.064 −1.19
PC1 0.493 ± 4.429 −0.985 ± 4.149 t 13  = 0.62, P = 0.55 0.37
PC2 0.365 ± 1.308 −0.730 ± 1.130 t 13  = 1.59, P = 0.14 0.94
Wing bar (median covert) Brightness 2.962 ± 0.229 3.898 ± 0.334 t 13  = −6.43, P < 0.001 3.78
Chroma 0.193 ± 0.025 0.309 ± 0.035 t 13  = −7.52, P < 0.001 4.38
Hue 1.284 ± 0.069 1.268 ± 0.014 t 13  = 0.51, P = 0.62 0.30
PC1 −2.604 ± 1.995 5.209 ± 2.874 t 13  = −6.20, P < 0.001 −3.65
PC2 0.170 ± 1.229 −0.340 ± 1.065 t 13  = 0.79, P = 0.45 0.46