Bird flu is decimating the world’s seal colonies

Robert F. Bukaty / Associated Press File

Harbor seals keep watch from a small island off Portland, Maine, on July 30, 2020.

Robert F. Bukaty / Associated Press File

A gray seal swims in Casco Bay off Portland, Maine, in this Sept. 15, 2020.

PORTLAND, Maine — Avian influenza is killing tens of thousands of seals and sea lions in different corners of the world, disrupting ecosystems and flummoxing scientists who don’t see a clear way to slow the devastating virus.

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