Fig. 2From: Noise constrains the evolution of call frequency contours in flowing water frogs: a comparative analysis in two cladesPhylogeny of Bufonidae and Ranidae species included in Pagel’s λ model, with corresponding habitat and call characters. Bars next to the taxa names indicate Bufonidae (blue) and Ranidae (orange). Call characters reflect whether each taxon has harmonic and conspicuous FMBack to article page