第710回　三田演説会　「鳥の渡りと地球環境の保全」　樋󠄀口 広芳 君（東京大学名誉教授／慶應義塾大学自然科学研究教育センター訪問教授）

Picked video by video from 慶應義塾 Keio University (mixed channel): title plainly names a teaching subject. Channel transcript sample: The only sample with an actual transcript is a conversational panel discussion (Hidden Jewels series) rather than structured teaching, while the other two samples lack transcripts to verify, consistent with the channel's mixed nature.