A hunter could then mistakenly conclude that the bear has no cubs. If he shoots her, he ends up killing more than one bear. Calling can be put to good advantage during the fall season. First and foremost you have to be where the bears are. A bear's stomach determines where he's going to be.
Some hunters contend that sows do make moaning sounds when they're in heat.
They claim that you're targeting mature boars that come to baits in the spring. They're not necessarily looking for groceries. Since bait sites tend to concentrate black bears, boars tend to check them out in their search for sows in breeding condition. The sow moan is good conservation, since it helps hunters separate boars from lactating sows that may be nursing cubs at the time they're using baits. Since adult male bears will kill cubs if given the chance, removing the big boys from the population helps to secure the future for the coming generation.