An odor trail laid more or less continuously by the advance workers of a foraging group.

This kind of communication is used regularly by army ants.

A chemical trace laid down by one insect and followed by another.

The odorous material is referred to either as the "trail pheromone" or the "trail substance".

An odor trail laid by scout workers and used to recruit nest mates to a food find, a desirable new nest site, a breach in the nest wall, or some other place where the assistance of many workers is needed.

A substance laid down in the form of a trail by one animal and followed by another member of the same species.

The intrusion of one species into the social system of another (as, for example, by utilization of the trail system) in order to steal food.