During which months does subterranean swarming typically occur in Southern California?

Subterranean swarming typically occurs in Southern California during the months of February, March, and April. This period aligns well with the life cycle of subterranean termites, where swarming is most common as the weather begins to warm up after winter. During these months, termites emerge in search of mates to establish new colonies, which is why you may observe an increase in their activity.

The other choices do not correspond with the known peak swarming period for subterranean termites in this region. For instance, swarming in January, February, and March would be too early, as it is generally still cooler and less conducive for termite activity. Similarly, swarming in April, May, and June or June, July, and August would be too late in the season or outside the typical range for the swarming behavior of subterranean termites, as they usually swarm in early spring.