<p><strong>Video 1.</strong> Experiment with an individual of <em>Boana albomarginata</em> in a view from above, showing the four speakers with high, medium and low-pitched calls and the white noise. A white circle indicates the individual of the trial.</p>
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<p><strong>Figure A1.</strong> Frequency response of speakers used in the experiment (Frequency axis is in log scale). </p>
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<p><strong>Figure A2.</strong> Average percentage of pixels in each colour bin of photographs with their respective 5% confidence interval.</p>
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<p><strong>Figure A3.</strong> Density plot between Scaled Mass Index (SMI) and orange and red colours.</p>