Daniel from Az writes
The Bird Barrier Bird Gard 110v Pro 1 (sd-bg40) is designed to repel pigeons, starlings, sparrows, and seagulls, but not grackles. This device can work effectively to deter birds from roughly 100 feet away from the unit. For grackles, you may want to consider visual scare devices instead.
Answer last updated on: 03/31/2022
