This animation was created for a projection in a play.
The termites are silhouettes in a white background. They do not have any feet.
The termites have been created using boid particles. The setup is pretty simple.
There are a few Force fields to disperse the termites as if they have been sprayed with some pesticide.
I have still not figured boids completely, but this was more or less what worked perceptually to suggest a termite like movement.
The compositor is used to give a diffused look to the mites.
Cool idea!