A pair of Bald Eagles will reuse their nest each year and repair it with new tree branches. But recently in British Columbia, scientists came across an eagle nest made largely out of dried kelp. Back in the ‘90s, that very nest had been made out of tree branches. What changed? Sea Otters were reintroduced to the landscape, which helped kelp forests flourish — and occasionally wind up in an eagle’s nest.

More info and transcript at BirdNote.org. 

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