Table 2.
Principal components (PC), weightings and variance explained from a principal components analysis. PC1 is used in the paper as a proxy for EE strategy. Dataset includes one measure of EE traits per trip (N patches = 292; N trips = 274; N birds = 228)
| Foraging variable | PC1 | PC2 | PC3 | PC4 |
|---|---|---|---|---|
| Time in patch | 0.62 | −0.03 | 0.29 | −0.72 |
| Foraging effort | 0.60 | 0.01 | 0.41 | 0.68 |
| Size of patch | 0.50 | 0.14 | −0.85 | 0.07 |
| Number of patches | −0.05 | 0.99 | 0.13 | 0.04 |
| Proportion of variance explained | 0.47 | 0.26 | 0.16 | 0.12 |
| Cumulative variance explained | 0.47 | 0.72 | 0.88 | 1.00 |