Fig. 2

Spectrograms of (a) SEIO PBW songs (b) SWIO PBW songs, and (c) ANT BW songs from the southern Indian Ocean. The units selected for the detector are framed in white.

Spectrograms of (a) SEIO PBW songs (b) SWIO PBW songs, and (c) ANT BW songs from the southern Indian Ocean. The units selected for the detector are framed in white.