Swarming usually occurs in the evening hours following a warm, rainy day in the late spring or early summer. A single colony of Formosan termites may release over 70,000 swarmers.

How long does termite swarming season last?

For starters, let's elaborate on that timeline a little bit more: termite swarming season starts in late winter, but lasts all the way through around September or October. So basically, we're talking about a swarming season that lasts anywhere from 5-6 months.

How often do Formosan termites swarm?

Formosan Termites swarm in the spring and summer months.

They often swarm at night. The alates will shed their wings after flight and find a safe place to mate (moist wood) and begin their colony by laying eggs. Mature colonies of Formosan Termites can have anywhere from 1-10 million termites within them.