In San Francisco, river otters used to be plentiful, but have disappeared due to hunting, pollution and development. The animals are seen as a barometer for water quality, so their disappearance marked bad news for environmentalists and residents. Now that this lone otter has returned to area of his ancestors, conservationists hope it is a sign of change and successful environmental regulations.
Rare River Otter Returns to San Francisco, Stumps Researchersthe daily dish
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