The best fitting generalised linear models of the factors associated with adult male song rate: glm(song rate ~ age + body condition + brood size + breeding stage + provisioning rate + body condition: Brood size + body condition: Provisioning rate + brood size + provisioning rate, family = “poisson”) Only those models with an AICc value within 2 of that of the best fitting model are shown, apart from the null model which is included by way of comparison.

For the full list of models see S3 Table.