This restricted use pesticide causes birds to flutter and convulse, killing the effected bird and scaring the non-effected birds from the site.

• A. Avitrol
• B. DDT
• C. Chlorpyrifos
• D. Permethrin

Answer: (A)

This question tests knowledge of an avicide used to deter pest birds by creating an alarm response. Avitrol is a restricted‑use pesticide formulated as a scare bait. When a few treated birds ingest it, they show distress symptoms such as fluttering or convulsions, and some die. The visible distress acts as a warning signal to nearby birds, causing them to avoid the site. That combination of inducing distress in some birds and scaring others away is what makes this product the correct match.

The other pesticides listed are general insecticides that aren’t used to produce an alarm or deterrent effect in birds, and they aren’t designed for restricted-use avian deterrence. DDT is largely obsolete/persistent, while chlorpyrifos and permethrin are used for insect control and don’t function as bird-scaring avicides.