Animal communication: Complex call production in the túngara frog

M. Gridi-Papp, A. S. Rand, M. J. Ryan

Nature 441, 38 (2006)

The bar coloration as specified in Fig. 1a of this communication is misleading: it should indicate the relative amplitude of odd-to-even harmonics before (red bars) and after (blue bars) treatment for the'chuck' and 'whine' call components.