This PDF file includes:

• Fig. S1. Spectra of the targets in the bimodal learning experiment.
• Fig. S2. The distribution of the bats’ angles relative to the targets.
• Fig. S3. Spectra of the targets in the cross-modal recognition experiment—round 1.
• Fig. S4. Spectra of the targets in the cross-modal recognition experiment—round 2.
• Reference (40)

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