River otters have staged a remarkable comeback across North America’s Great Lakes after disappearing from many waterways by the 1970s. Reintroductions beginning in the 1980s, combined with wetland restoration and pollution controls under the 1972 US–Canada Great Lakes Water Quality Agreement, have allowed breeding populations to recover across Ohio, New York, Ontario and beyond. Rewilding Magazine https://www.rewildingmag.com/the-river-otters-remarkable-comeback/
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