The Starling Invasion: Why This Common Bird Can Become a Serious Home Hazard

European starlings may look harmless, but these small, dark birds are responsible for some surprisingly big problems around homes and commercial buildings. Introduced to North America in the late 1800s, starlings spread rapidly and displaced many native bird species—earning them a reputation as one of the most aggressive invasive birds in the United States.

Why European Starlings Are Considered Invasive

Starlings reproduce quickly, adapt easily to human environments, and aggressively compete with native birds for food and nesting space. They often take over cavities meant for bluebirds, woodpeckers, and other beneficial species, pushing them out entirely. Their large flock sizes amplify their impact, especially in urban and suburban areas or agricultural settings.

Common Starling Nesting Places Around Homes

Starlings prefer sheltered, elevated areas that provide warmth and protection. Common nesting and roosting spots around homes and commercial properties include:

• Roof vents and bathroom exhaust vents
  
• Dryer vents
  
• Attics and soffits
  
• Gutters and eaves
  
• Gaps in siding or under rooflines
  
• Warehouse rafters and commercial vents
  

Problems Starlings Can Cause

Once starlings settle in, problems tend to escalate quickly:

• Constant noise from chirping, squawking, and wing activity
  
• Heavy droppings accumulation, which can stain surfaces and pose health risks
  
• Blocked vents, increasing fire risk and reducing airflow
  
• Damage to siding, insulation, and vent covers from nesting activities
  
• Increased insects, as parasites and bugs are attracted to nests and debris
  

How Critter Guard’s BirdBloc Can Help

At Critter Guard, we offer BirdBloc, a professional-grade bird deterrent solution designed to prevent starlings and other species from roosting or nesting around homes, commercial buildings, and electrical equipment. BirdBloc capitalizes on birds’ developed sense of smell, emitting a long-lasting repelling smell that stops bird infestations before they start.  

Keep starlings away from your home or building. Contact us today to learn more about our BirdBloc product and how it works.