Pheromones are "chemicals produced by an insect to send signals or messages to other insects of the same species". Sometimes other species may receive the chemical message that was not meant for them, but may still react to the message for a different purpose. For instance, a female moth may send a message to potential mates that she is ready to be mated, but parasitic wasps read the message as the location of something to prey on. Sometimes a species may imitate another species' chemical message to lure it to its doom. The chemical in this case is not called a pheromone because the the sender and the receiver of the message are not of the same species.