Polar bear-grizzly hybrids are extremely rare, though one was found (that is, shot) last year.
Now a second generation bear might have been discovered (shot by a native hunter). Story in the National Post.
A second generation grizzly-polar bear?
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Is there any record of black bears breeding with grizzlies?
Jeff,
No, they are not genetically compatible.
Polar bears are actually an off shoot of the Brown bear and their hybridization, if you want to call it that, is all in the family.
With all of these extinctions, we need some hybridization to give the taxonomists something to do! 😉