Predators include humans -- otters are one of the subsistence species -- and killer whales. Bald eagles are known to hunt otter pups when other food is scarce. Biologist Jim Bodkin, who studies ...

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"It's the biggest killer of them, [it] leaves cubs behind". He said it had been proven if you hit an otter at 30mph, it is still likely to die - so a driver's awareness of their environment was key.