Rainfall can explain adaptive phenotypic variation with high gene flow in the New Holland Honeyeater (Phylidonyris novaehollandiae).

In males, all traits except bill width differed significantly across study sites after Bonferroni adjustment ( Table 2 ); in females, only bill depth differed significantly across study sites, but bill-head length, bill-nostril length, and bill width showed near-significant variation ( Table 2 ).

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