Fine-Grained Categories of bird_song:

• natural:sound,
• vocal:signal,
• natural:entity,
• pleasant:sound,
• sexual:signal,
• concrete:sound,
• dead:ballad,
• traditional:sound,
• animal:sound,
• complex:behavior,
• beautiful:ballad,
• acoustic:signal,
• complicated:sound,
• essential:sound,
• complex:signal,
• environmental:noise,
• everyday:sound,
• stereotyped:behavior,
• seasonal:behavior,
• transient:sound,

Poetic Qualities of bird_song: