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Blue whales start singing in the daytime rather than at night just before migrating, study finds | Daily Mail Online
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Frontiers | Seasonal Occurrence of Sympatric Blue Whale Subspecies: the Chilean and Southeast Indian Ocean Pygmy Blue Whales With the Antarctic Blue Whale
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Revealed: First ever global map of whale migration exposes growing dangers along superhighways | Climate News | Sky News
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WWF Protecting Blue Corridors Report - World-First Map Exposes Growing Dangers Along Whale Superhighways. — WWF Protecting Whales & Dolphins Initiative
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