Model-selection results for full dataset examining the influence of vocal features and urban classification in explaining responses to noise.

PCFreq was negatively associated with signal frequency, PCDur was negatively associated with signal duration, and urban reflects species classification as urban-tolerant (breeding in urban areas) or non-urban. All candidate models are shown, including the null (intercept only model). K represents the number of parameters in the model, AICc values are Akaike's information criteria for small sample size and ΛAICc is the difference in AICc values from the top-ranking model. Models with ΛAICc<4 are considered to have support and used to calculate Akaike weights (wi) for model-averaging coefficient estimates.