Table 2.
Principal Components with eigenvalues >1 for 28 note-types emitted ≥5 times across the study, where each note-type was emitted by >1 individual of the Lilac-crowned Amazon.
| PC1 | PC2 | PC3 | |
|---|---|---|---|
| Overall eigenvalues | 3.49 | 2.67 | 1.76 |
| Explained variation (%) | 26.3 | 23.4 | 22.3 |
| Variance Pitch | 0.805 | 0.384 | 0.211 |
| Frequency Modulation | 0.794 | −0.325 | −0.032 |
| Goodness of Pitch | −0.704 | 0.157 | 0.293 |
| Duration | −0.697 | −0.104 | 0.297 |
| Mean Pitch | −0.165 | 0.857 | 0.158 |
| Low Frequency | 0.083 | 0.775 | −0.058 |
| Weiner Entropy | 0.531 | −0.659 | −0.158 |
| Mean frequency | 0.483 | 0.585 | 0.133 |
| Bandwidth | −0.037 | 0.176 | 0.942 |
| High frequency | −0.026 | 0.268 | 0.916 |
| Harmonics | −0.287 | −0.266 | 0.663 |
Bold text highlights variables with greatest weighting for each component (r >0.60)