Starling, Blackbird, and Grackle
Flocking birds that roost by the thousands at food plants, distribution centers, and retail lots.
How to identify
European starlings are stocky, about 8 inches, glossy black with light spots in winter and a yellow bill in spring. Great-tailed grackles are larger, with long, keel-shaped tails; males are glossy black with yellow eyes.
Why it is a problem for commercial facilities
Huge flocks leave heavy droppings on vehicles, walkways, and inventory. Starlings build bulky, flammable nests inside vents, drainpipes, and equipment enclosures.
Protected status
European starlings are non-native and not protected under the federal MBTA. Great-tailed grackles and native blackbirds are federally protected under the MBTA, so control relies on non-lethal deterrents and exclusion.
How BSI controls it
- Bird exclusion netting with 1-1/8-inch mesh for structures and loading areas
- Ledge slope systems and vent screening to stop nesting
- Cleanup and decontamination of roost areas
Where we see it most
Common questions
Are grackles protected like starlings?
No. Starlings are unprotected, but grackles are protected under the MBTA, so methods differ by species.
What mesh size stops starlings?
1-1/8-inch netting excludes starlings and larger birds.
Dealing with this species at your facility?
Send two photos and the project location. We will come back with a recommended system and scope.