Bird Mites

Bird mites (Dermanyssus gallinae and Ornithonyssus sylviarum) are tiny parasitic mites that primarily live on pigeons, sparrows, starlings, and chickens. When a bird nest is abandoned — or when fledglings leave in summer — the mites that remain in the nest begin moving in search of a new host, often entering the building through gaps around roof voids, eaves, and window frames.

Although bird mites can bite humans, they cannot survive or reproduce on human blood alone. Without a bird host, they will die within 2-3 weeks. This is the most important fact about bird mite infestations: the solution is not insecticide treatment — it is removing the bird nest and its host. Insecticide treatment without nest removal will only provide temporary relief while mites continue to emerge from the nest.

Identification

Bird mites are extremely small (0.75-1mm) and difficult to see without magnification. They are nearly white when unfed, turning bright red immediately after feeding on blood, and grey to black as the blood meal is digested. They move quickly across surfaces and skin. Unlike bedbugs, bird mite bites typically produce immediate skin irritation — small red welts that itch intensely, often appearing on the arms, neck, and torso.

Why Are Bird Mites Entering My Home?

The most common scenario in Dublin homes:

• A bird (most commonly a pigeon, sparrow, or starling) nests in the roof void, soffit, or eaves during spring
• Chicks fledge and leave the nest in summer (June-August)
• The mites that remain on the nest move into the building seeking a new blood source
• Homeowners experience sudden unexplained biting with no visible insect

The first step is always to locate and safely remove the bird nest. In Ireland, all wild bird species and their active nests are protected under the Wildlife Act 1976 — nests can only be removed once they are confirmed empty and inactive. Once the nest is removed and the entry point sealed, the remaining mites in the building will die off within 2-3 weeks.

What To Do If You Have Bird Mites

• Locate and confirm the source nest — check eaves, soffit vents, roof tiles, chimneys, and any open gaps near the affected area
• Confirm the nest is empty and inactive before removal — check for eggs or live chicks
• Remove the nest and seal the entry point to prevent re-nesting
• Vacuum infested rooms thoroughly and frequently to remove mites — pay particular attention to rugs, carpets, curtains, and upholstered furniture
• Wash bedding at 60°C where biting is concentrated around the bedroom
• Apply natural insect killing dust or residual insecticide to affected areas to accelerate mite elimination — but only after the nest source is removed

If you cannot identify or safely access the nest, or if the infestation is extensive, contact Owl Pest Control for a professional inspection and treatment. We can identify the nest location, advise on legal removal requirements, treat the affected areas, and proof the entry point to prevent re-nesting.