>>/41498/
It's hard to say, I will say this however and you may want to sit down for this.
We have no conclusive evidence that they ever STOPPED flying. I think that in places of high altitude and sparse resources like the Himalayas they could still be cast that do fly, this could happen in the interior of Antarctica as well, being often nocturnal they would be even more difficultly to see and may get passed of as owls, dinosaurs or Mothmen in the dark.
>>/41499/
More seem to than not and pretty much every big cat does, even the ones that are pure black are only that way due to a rare condition causing melanin excess.