Unlike native subterranean termites which swarm during the day, Formosan termites typically swarm from dusk until midnight. They also swarm later in the season than most other termites, usually between April and June.
If you compare these Formosan alates to the eastern subterranean reproductives on the previous page, you'll notice the Formosan termites are lighter in color. Their bodies are a yellowish-brown, and their wings have a smoky color to them. Formosan termites are also noticeably larger than our native termites.