日本树莺 / Japanese Bush Warbler

The Japanese bush warbler is the subspecies and naming case in 47.鸟有什么好看的：原来…丹顶鹤是秃的！. The episode uses it to explain Latin scientific names, subspecies names, and Kawakami’s joke that a mainland-breeding subspecies had taken over the common “Japanese bush warbler” identity from the Ogasawara-associated nominate form.

The bird also becomes a conservation complication. After goats and black rats helped eliminate one island population, removing those invasive animals did not simply restore the old state; another subspecies could arrive and create possible gene-flow or identity problems.

Connections

• [[OgasawaraIslands|小笠原群岛]] - island context for the subspecies discussion.
• [[KawakamiKazuto|川上和人]] - source author explaining the case.
• Invasive Species Management - goats, rats, and recovery complications.
• Evolutionary Trait Interpretation - taxonomy and traits need history.
• Ornithological Fieldwork - field identification and population observation.