Canto nocturno (co-cantares I) utiliza:

• Nightingale song 3.wav de reinsamba | Licencia: Attribution 4.0

Escuchar la llamada de la mar (co-cantares II) utiliza:

• MBARI_MARS_2017_1107h22_HumpbackWhaleSongSession.wav by MBARI_MARS | License: Attribution 4.0
• Crickets during the night, close to the beach in Mexico de felix.blume | Licencia: Creative Commons 0
• Waves in the sea in the Gulf of Mexico de felix.blume | Licencia: Creative Commons 0