Table 3.
Analysis of deviance tables for nested model comparisons for species trait variables, one continuous—body mass, three binaries—sexual dimorphism, sedentary, and short‐distance migrant (the latter together describe migratory behavior—two zeroes equal to long‐distance migration), and one categorial—the diet (possible values insectivorous, omnivorous, plant/seed eater)
| Model comparison | Number of parameters | Log‐likelihood | Deviance | df | p‐Value |
|---|---|---|---|---|---|
| Year | 5 | −450.00 | 1.04 | 1 | .31 |
| Year + body mass | 6 | −449.49 | |||
| Year | 5 | −450.00 | 1.84 | 1 | .17 |
| Year + sexual dimorphism | 6 | −449.08 | |||
| Year | 5 | −450.00 | 0.20 | 1 | .65 |
| Year + sedentary | 6 | −449.90 | |||
| Year | 5 | −450.00 | 2.96 | 1 | .09 |
| Year + short‐distance migrant | 6 | −448.53 | |||
| Year | 5 | −450.00 | 1.72 | 2 | .42 |
| Year + diet | 7 | −449.15 |
All models, that is, generalized linear mixed models (with beta‐binomial logit function) with proportion of surviving bird individuals out of the total loaded as a response variable, contain an intercept term. Difference in model deviance is assumed to be distributed as chi‐squared with specified degrees of freedom (df).