As long as the food source remains, the pheromone trail will be continuously renewed.

Mr. Wish did not know that he also left a pheromone trail.

It was a pheromone trail of murder.

When ants lose the pheromone trail made by the leaders they start following each other in a circle constantly until they die.

Over time, however, the pheromone trail starts to evaporate, thus reducing its attractive strength.

Females are triggered in this way to ovulate and produce a pheromone trail (using glands on her skin) which the males follow.

Once foraging workers locate a resource in their environment, they will lay down a pheromone trail as they return to the colony.

Other workers then follow the pheromone trail to the resource.

More ants then retrace the shorter path, reinforcing the pheromone trail.

When any termite finds a food source, it leaves a pheromone scent trail to summon nestmates.