After watching Frozen Planet II - they only got brown bears on film killing musk ox calves, no adults, (edit:also reindeer calves) and it took what are called s

After watching Frozen Planet II - they only got brown bears on film killing musk ox calves, no adults, (edit:also reindeer calves) and it took what are called super packs of twenty plus wolves to take down one bison, it took that many to first get one separate from the rest of the pack of bison and it was not that many bison. The wolves also had a low success rate.