Table 2. Matrix of correlations among the variables measured in house sparrows before the start of the experiment and bib colouration (hue, saturation, and lightness).

Significant or almost significant correlations are indicated in bold, although no correlation remained significant when the correction of Bonferroni was applied. * for P < 0.05, and § for P = 0.061.

	Bib lightness	Bib saturation	Bib hue
Wing length	0.153	–0.345	0.155
Body condition	–0.161	−0.515*	0.257
Uropygial gland size	–0.335	−0.542*	0.453*
Bib size	–0.083	0.416§	−0.269