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.
From: Contextual flexibility in the vocal repertoire of an Amazon parrot
| Â | 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 |