Pest Birds: Real Structural and Health Consequences

Name: 101 Exterminators Inc.
Address: Salinas, CA, 93901, US
Telephone: (831) 500-1613
Price range: $$
Rating: 5

Scientific name: Columba livia, Sturnus vulgaris, Passer domesticus

Feral pigeons, European starlings, and house sparrows are invasive species in the United States that cause structural damage, health risks, and nuisance conditions wherever they establish roosting or nesting sites. Unlike native birds, these three species have no federal protection and can be managed without restriction.

Bird Netting & Control (831) 500-1613

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Visual Guide

How to Identify Birds

Size

Pigeon: 29–37cm. European starling: 19–23cm. House sparrow: 14–16cm.

Color

Pigeon: gray with iridescent neck, white rump. Starling: dark with yellow bill (summer), heavily spotted (winter). House sparrow: brown-streaked with gray cap (male).

Body Shape

Pigeon: stocky, small head, fast wing-beat pattern. Starling: short tail, long bill, pointed wings in flight. House sparrow: small, chunky.

Distinctive Features

Pigeons roost on ledges and leave characteristic white-gray droppings. Starlings nest in cavities (vents, soffits) in large numbers. House sparrows stuff nesting material into any available opening.

Biology

Behavior & Lifecycle

Pigeons are highly site-faithful — once they establish a roosting ledge, they return daily for years and attract others. Starlings nest in large communal groups in cavities and vents, blocking airflow and creating fire hazards. House sparrows aggressively fill any gap they can enter with nesting debris — HVAC vents, dryer exhaust vents, and light fixtures are favorite nest sites.

Commonly Found In:

Commercial rooftopsLedges and parapetsLoading docksAgricultural buildings

Local Knowledge

Birds in Central California

Pigeon populations are substantial in downtown Monterey, Salinas, and San Jose. Agricultural facilities in the Salinas and San Benito valleys face persistent starling and house sparrow pressure during harvest seasons. Commercial facilities in Santa Clara County — especially warehouses and distribution centers — deal with pigeons roosting on rooftops and in loading dock areas.

Why This Matters Here

Pigeon droppings contain uric acid that etches metal, stone, and painted surfaces. They carry Histoplasma capsulatum (histoplasmosis), Cryptococcus neoformans (cryptococcosis), and other pathogens. Nesting material in vents creates fire hazards and blocks required mechanical ventilation. At food facilities, bird activity represents a direct food safety violation.

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Prevention

How to Reduce Your Risk

The most cost-effective pest control is prevention. These steps reduce the likelihood of birds problems — particularly important for properties in our service area where the conditions favor this species.

01
Install ledge exclusion hardware (spikes, wire deterrents) on all flat roosting surfaces
02
Screen and cover all vents and mechanical openings
03
Address any new roosting activity immediately — once established, birds are harder to dislodge

When to Call a Professional

When pigeons are roosting regularly on your structure, when bird nesting is blocking vents or creating fire hazards, or when droppings accumulation is creating health or surface damage concerns.

Call (831) 500-1613 Request a Free Inspection

Service available in:

Monterey CountySan Benito CountySanta Cruz CountySanta Clara County

Common Questions

Birds FAQs

Are there laws protecting pest birds in California?

Feral pigeons, European starlings, and house sparrows are not protected by the federal Migratory Bird Treaty Act because they are non-native introduced species. Native migratory birds (including swallows, which often nest on structures) are protected — disturbing active nests with eggs or chicks is prohibited. We ensure all bird control activities comply with applicable federal and California regulations.

Professional Treatment

Ready to Address Your Birds Problem?

Our licensed technicians serve Monterey, San Benito, Santa Cruz, and Santa Clara counties. Free inspection, written estimate, no obligation.

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