The results from a PCA of EB showing eigenvectors and eigenvalues.

The first four principal components are shown as they have an eigenvalue of >1 and cumulatively explain 80% of the variation (N = 1383). The positive loading on all factors for Prin1 shows that the amount of time birds spend flying, hopping and the number of visits to all areas has a positive effect on this score: i.e. it is a measure of exploration.