Table 1.
Presence of rattles, buzzes, or trills in song recordings of passerine species, relative to island living, latitude, body mass, and vegetation density of habitats. Results of full and reduced GLMMs paired by species are presented
| Rattles | Buzzes | Trills | ||||
|---|---|---|---|---|---|---|
| Full model | Final model | Full model | Final model | Full model | Final model | |
| Insularity |
 = 2.06 (0.152) |
 = 3.96 (0.047) |
 = 4.51 (0.034) |
 = 4.94 (0.026) |
 = 0.03 (0.875) |
|
| Latitude |
 = 3.02 (0.082) |
 = 3.43 (0.064) |
 = 2.96 (0.085) |
 = 3.12 (0.078) |
 < 0.01 (0.953) |
|
| Insularity × latitude |
 = 1.70 (0.192) |
 = 3.23 (0.072) |
 = 5.36 (0.021) |
 = 5.39 (0.020) |
 = 0.02 (0.893) |
|
| Mass |
 = 1.07 (0.302) |
 < 0.01 (0.987) |
 = 0.41 (0.520) |
|||
| Vegetation density |
 = 2.96 (0.227) |
 = 0.75 (0.686) |
 = 6.23 (0.044) |
 = 8.73 (0.013) |
||
Indicated are χ² statistics for each factor or covariate and P-values (significant values in bold).