Polar Bear in northern Canada | CBC North

Tigers are consistent maneaters only in one place on earth (the Sundarban mangrove forest on the border of Bangladesh/India). That's also coincidentally the forest where there has never been a large hunting expedition in 2nd half of 19th and 1st half of 20th century that killed off most maneaters.

Also, avoiding humans may not have to do so much with DNA, but with "culture." Tigers will specialize on particular types of prey, and mothers will teach their cubs to hunt that prey. If you break the chain by killing a maneater, you avoid cubs "learning the lesson."

Polar bears live in an icy desert, and they may not even have a "culture" on what to hunt -- they will simply go for the first moving thing they see.

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