Mates of Competitive Females: The Relationships between Female Aggression, Mate Quality, and Parental Care

Table 2

Results of the principal component analysis (PCA) for estimates of male quality. Shown are the loadings for the first two principal components. Tail-white is an estimate of ornamentation, referring to the amount of white on the outer retrices (tail feathers).

Measure	Prin1	Prin2
Wing chord	0.89	0.04
Tail length	0.83	0.34
Tarsus length	0.37	−0.61
Tail-white	−0.15	0.61
Eigenvalue	1.63	1.09
Percent of variance explained	41%	27%