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For the past five seasons, Barrett-Lennard and his Alaskan colleague, researcher Craig Matkin of the North Gulf Oceanic Society in Homer, have been studying a unique and previously unknown population of mammal-eating killer whales in the northwest Gulf of Alaska.
Their work is now shedding light on the orcas of the north Pacific, revealing unexpected twists in their natural history and showing how their behaviour affects a wide range of other species.
Among the novel aspects to these killer whales are their songs, the mysterious circular scars on their bodies and their uncanny ability to hunt young grey whales.
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