What is a notable characteristic of subterranean termites?

The notable characteristic of subterranean termites is that they have bodies that are almost black and possess wings, particularly during their reproductive stage when they swarm. This is significant because the swarming phase is when they leave their original colonies in search of new locations to start their own colonies. Their coloration and the presence of wings during this stage help differentiate them from other types of termites and insects.

Most subterranean termites have a dark brown to almost black color, which is typical for many species in this group. The wings are important as they indicate a specific life stage and behavior (the swarmers, or alates) that occurs under certain environmental conditions usually linked to temperature and humidity.

While subterranean termites are often small and can be wingless in their worker and soldier forms, the reproductive individuals do have wings when they swarm. Additionally, swarming can occur both during the day and at night depending on the species and environmental factors, making the statement that they only swarm at night inaccurate. Their size and lack of bright coloration further imply they are adapted for life underground rather than being visually striking.