Smell
Termites communicate primarily through chemicals known as pheromones. Termites secrete pheromones to indicate food sources, signal danger and select mates. Each colony has its own unique odor.
Vibration
To signal danger to the colony, termites hit their heads against the sides of their tunnels, the piece of wood they are eating or another surface. Termites sense these signals as vibrations through their legs and antennae.
Physical Contact
Termites also communicate through physical contact. They groom one another and exchange food. They also bump into each other to communicate alarm.
Visual Clues
Most termites are blind. Inside their dark colonies, they do not need visual clues, although light might play a role in communication outside of their colonies.
Potential
In 2007, Mississippi State University researchers found that termites are attracted to vibrations emitted by the wavelengths of certain electrical fields. The researchers have developed a technology that uses radio waves to lure termites to bait stations (see Resources).
Fun Fact
Thousands of termites hitting their heads against a surface can produce noise loud enough for humans to hear.