Great Black-backed Gulls have a reputation as serious predators of other birds like puffins, grebes, and songbirds as big as a grackle. Just over a century ago, these birds were nearly wiped out by feather hunters and egg collectors. And though their populations recovered with help from environmental protections, Great Black-backed Gulls are in decline once again — and scientists are still trying to figure out why.

More info and transcript at BirdNote.org.

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