Nature recording credits. The six recordings are hosted by this site. Original recordists, source pages and selected licenses are listed below. Audio licenses apply to the recordings, not to the application code.
本站循环音轨对源录音剪辑、交叉淡化并调整音量，不改变物种原有音高。MP3 为 Wikimedia 提供的转码版，Ogg 为原录音。每段素材仍按下表许可证提供。Playback uses mixed loops and volume adjustment without pitch shifting.
日间混入布谷、珠颈斑鸠、家麻雀，夜间混入下表三种蝉鸣。剪辑、响度平衡、2 秒交叉淡化及首尾相位对齐；无变调。Both mixes contain excerpts from the credited recordings below and are offered under CC BY-SA 4.0. Original recordings retain their respective licenses. Audio licenses do not cover application code.
日间鸟鸣（46 秒）
夜间蝉鸣（36 秒）
| 录音 / Recording and source | 作者 / Recordist | 许可证 / License |
|---|---|---|
| 布谷（大杜鹃） / Cuculus canorus | Σ64 | CC BY 3.0 |
| 珠颈斑鸠 / Spilopelia chinensis | Manoj Karingamadathil | CC BY-SA 4.0 |
| 家麻雀 / Passer domesticus | Gypsypkd | Public domain |
| 油蝉 / Graptopsaltria nigrofuscata | ISAKA Yoji ( cory )[ Recent works / Other works ] | CC BY 2.1 jp |
| Cicada orni / Cicada orni | Travus | CC BY-SA 2.5 |
| Meimuna opalifera / Meimuna opalifera | Koba-chan | CC BY-SA 3.0 |