Table 2.
Top model and models within two AICc (models with uninformative terms dropped) reported for each of the three principal components (PC) describing song structure and for individual song traits, which are grouped with the PC on which they loaded most strongly. Values reported for the best branch length transformation
| Trait | Signal | ΔAICca | wb | ERc |
|---|---|---|---|---|
| Song PC1 | Body Size | 0.45 | 178 | |
| PEAK | Body Size | 0.42 | 581 | |
| BW | Habitat | 0.29 | 6 | |
| MAXF | Body Size | 0.46 | 99 | |
| MINF | Body Size + Habitat | 0.36 | 6,179 | |
| MINF | Beak Size + Habitat | 1.44 | 0.18 | 3,001 |
| Song PC2 | Constant | 0.13 | 0 | |
| DUR | Beak Size | 0.17 | 2 | |
| DUR | BODY size | 1.53 | 0.08 | 1 |
| NN | Habitat | 0.19 | 8 | |
| Song PC3 | Beak Moment + Habitat | 0.13 | 24,364 | |
| Song PC3 | Body Size + Habitat | 0.23 | 0.12 | 21,681 |
| Song PC3 | Beak Moment | 0.75 | 0.09 | 16,729 |
| Song PC3 | Beak Size + Habitat | 1.89 | 0.05 | 9,489 |
| PACE | Beak Size + Habitat | 0.14 | 2,411 | |
| PACE | Body Size + Habitat | 0.55 | 0.11 | 1,831 |
| VP | Beak Moment × Habitat | 0.48 | 10,558 |
AIC, Akaike Information Criterion; PEAK, song peak frequency, BW, song frequency bandwidth, MAXF, song maximum frequency, MINF, song minimum frequency, DUR, song duration, NN, number of notes, PACE, song pace, and VP, vocal performance score.
amodel AICc—top model AICc, bmodel weight, and cevidence ratio.