What is a primary effect of Avitrol on birds?

Avitrol is designed to induce erratic behavior in birds as a primary method of pest control. This effect occurs because Avitrol acts as a neurotoxin, causing disturbance in the normal nervous system functions of the birds. As a result, the erratic behavior serves to warn other birds away from the area, thus reducing the overall population of the pest birds without necessarily killing them immediately.

This behavior modification is a crucial aspect of how Avitrol functions in pest management, as it utilizes the natural warning responses of birds to enhance its effectiveness. The erratic behavior can deter other birds from feeding in the treated area, contributing to the control of pest populations.

In contrast, some of the other options focus on different aspects or uses of substances that are not the primary effects of Avitrol. Immediate death is not the intended primary action of Avitrol, as its design is more about behavior alteration. Additionally, Avitrol does not promote immunity in birds, nor does it function as a nutritional supplement. These aspects emphasize the tailored purpose of Avitrol in pest control rather than broader or unrelated effects.