Table 2

Principal components analysis of morphological data.

Variables

Factor loadings

PC1

PC2


Wing length

.71

.48

Tail length

.67

.55

Tarsus length

.83

.23

Bill length

-.37

.69

Bill depth

-.57

.63

Bill width

-.74

.40

Variance explained

44%

28%


Coefficients of correlation between morphological variables and the derived principal components extracted by principal components analysis.

Milá et al. BMC Evolutionary Biology 2010 10:158   doi:10.1186/1471-2148-10-158

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