Here in Oregon almost all of the ant species and the two termite species rely on an exact combination of atmospheric conditions to time their mating flights. In Beaverton, Tigard, and Tualatin these flights are earlier than in Hillsboro or the West Hills of Portland. Even 500 ft. of elevation changes the frost dates and the insect activity cycles.

The ant colonies produce winged reproductives in the nests and nurture them until the time is right to do their mating flight. I have observed that the right conditions to include calm winds, strong sunlight to provide strong thermal updrafts, and relatively cool temps, again to help with the thermal updrafts.

In Beaverton, Tigard, and Tualatin these thermals can be generated by a dark roof or an asphalt paved cul de sac. The technicians at Nature First Pest Control often comment to me about the diferent activity levels of insects and rodents on different facing slopes that have differing amounts of sun exposure. For the termites and ants ongoing survival, timing is everything. Successful exterminators know about these natural cycles in their areas

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