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Humpback whales form lasting bonds, the first baleen whales known to do so.
Individual female humpbacks reunite each summer to feed and swim alongside one another in the Gulf of St Lawrence, off Canada, scientists have found.
Using photographic identification techniques, the researchers can spot which individual whales appear from one year to the next.
During this study, they have found that the same humpback whales reunite each year.
Having spent the rest of the year apart migrating and breeding, individual humpbacks somehow find each other again in the open ocean each summer, spending the season feeding together.
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