クレジット

音源

• Morning birdsMixkit　Mixkit Free License
• Night forest with insectsMixkit　Mixkit Free License
• Wildlife environment in a riverMixkit　Mixkit Free License
• Cicada orni (Singing)Travus　CC BY-SA 2.5
• Singing cicada audioVitalie Ciubotaru　CC BY-SA 4.0
• Boomkikkers bij Witteveenluc de bruijn　CC BY 3.0
• OceanwavescrushingLuftrum　CC BY 3.0
• Storm en regenRaaphorst　CC BY-SA 3.0