Male brown bears in North America usually attack and kill cubs born to females that are not mated by them  However, during the annual salmon migration season between July and August, among brown bears fishing in Harrow Bay, male brown bears are less than 1/10 likely to attack and kill the cubs of female brown bears, while female brown bears with cubs are dozens of times more likely to encounter male brown bears
In this period when the female brown bear meets the male brown bear most, the cub is the least likely to be killed
Brown bears usually fight to protect their territory, and during the salmon migration season, they focus on their fishing skills and rarely fight for territory.