preposition of a source/footnote for "possibly extinct" when mentioning baiji?

edit

5-Year Review of the Chinese River Dolphin (Lipotes vexillifer) here is a source i would like to add, but if it's not relevant to the article, i just want to run it by more experienced editors Meiflavoringpacket (talk) 19:34, 11 September 2025 (UTC)Reply