Sarah Johnson
Customer Success
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Wildlife Nesting Material

Spotting and dealing with nests

Identifying animal nests in the attic or crawlspace is a clear indication of an established wildlife infestation. Most animals use insulation for nesting, but occasionally rodent nests (from mice or rats) are made of shredded paper or fabric in the home. In contrast, squirrel nests are typically larger and constructed from leaves, twigs, or other plant matter.

Look for bird nests in eaves, chimneys, or attics, and for bat colonies, the presence of guano (droppings) is usually the main sign near the entry point and roosting site. Nests found in wall voids or ceilings require immediate attention. It’s important to distinguish between active nests vs. abandoned nests and be aware of seasonal nesting patterns (like spring or fall). For safety, avoid handling nests on your own, especially with bare hands.

Count on the pros at Black Diamond to remove and clean up animal nests safely using protective equipment to avoid exposure to parasites and pathogens associated with nesting materials.

Birds on the chimney

Before Their Nest Costs You a Nest Egg

Nests are a clear sign of an established infestation and carry dangerous parasites and pathogens. Don’t risk costly exposure, Black Diamond’s certified pros use protective equipment for safe removal and complete attic sanitation.

Frequently Asked Questions

Are wildlife nests dangerous to human health?
Yes, abandoned or active wildlife nests pose a serious threat to human health, as they can harbor harmful bacteria, parasites, and airborne fungal spores.
You can determine if a nest is active or abandoned through professional monitoring to look for the physical presence or auditory signs of live animal activity.

Absolutely. Abandoned nests leave behind organic debris that acts as a magnet for secondary infestations, including:

  • Bat bugs and mites that parasitic on the original hosts but look for new targets.
  • Spider beetles, fleas, and flies that scavenge on leftover nesting materials.
  • Larger wildlife, like squirrels, looking to reuse the structure.