This article from the Times of London describes a finding that increasing numbers of orcas are switching to mammal diets -- a development that has some people calling for orca culls to protect threatened species such as sea otters and Steller's sea lions.
In a simultaneous development, there are reports that orcas have been showing up in the Canadian arctic, preying on sea mammals there.
Via Heather Reid-Stories from an Island, which is a very fine blog indeed.
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