The Coast Guard comes for people who canoe in the Detroit River. My family learned this from personal experience. The stated reason was to keep canoers safe from the lakers. Various groups kayak and canoe in the Rouge River but bass boats are seen in the Rouge River on nice days more frequently. [I have a view from the far side of the 'dead' tree with the cormorants in it - the flock had almost fifty cormorants in it at one time but now there are just a handful of them. EDIT they all came back this afternoon, so there's still almost fifty there, but they are expected to leave soon.] [So it's less of a free country if the Coast Guard tells you not to canoe in the Detroit River. On the plus side they are said to have new improved software to track people who are drifting in the water needing to be rescued.]
I looked up a distribution map to check on where the otter may have originated. Upthread there were suggestions that Ohio obtained some and placed them in various Ohio rivers; also otters live in the Harsens Island environs; but this distribution map has interesting gaps where river otters are not found.
https://en.wikipedia.org/wiki/North_...adensisMap.svg
There is a sliver of land across Michigan that doesn't have river otters in this map. Otters aren't found in Ohio but they are found in Michigan generally. The Windsor tip of the Ontario Peninsula is devoid of otters in this map. Then there is another sizable otter free sliver in New York as well. Tell me what that's about! Was it somehow polluted in that area?
https://www.newyorkalmanack.com/2021...er%20pollution.
"Historically, river otter could be found throughout New York, but they declined due to unregulated hunting, habitat destruction, and water pollution."
"From 1995 through 2000, 279 river otter were captured in eastern New
York and released at 16 different sites across the western part of the state."
Effectively the otter free wedge in New York has not been repopulated with otter yet, either via otter migration or by rehoming otters.
EDIT - the otter free wedge in New York is actually in Pennsylvania. Pennsylvania has some otter free rivers due to acid mine drainage.
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