Another of the documentarians then adds that this is a “sad reality of climate change” because they’d simply be on the ice right now if there were any in the area for them to rest on.
In the footage, one of the filmmakers offers up an explanation for the walruses falling by saying that instead of being able to rest on sea-ice between periods of feeding in the water, they now have to swim around 100 miles to rest on the shore and the cliffs, because there’s no more sea-ice, meaning that once they find themselves on the cliffs they’re so tired they can’t maintain a safe distance and end up falling to their deaths.