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Relation between dominant frequency and body size (left chart) and between advertisement call dominant frequency and tympanum size (right chart). The general relationship for all sampled species is in grey, and specific relation are coloured as follows: Asian ranids (black), Ranid frogs (red), Neotropical torrent frogs (blue), Fitzinger Neotropical treefrogs (green) and Neotropical swamp frogs (orange). Correlations are not significant.
