Firebrats are prey for several small predators that share buildings with them, most notably house centipedes, spiders, and earwigs. These predators can catch firebrats when the insects leave their hiding places, but they should not be viewed as a dependable form of pest control. A predator may eat individual firebrats without eliminating the conditions supporting the larger population.
Firebrats are particularly vulnerable when moving between the cracks and crevices where they spend much of their time. Their speed provides some protection, and the sensory structures at the rear of the body form part of a specialized predator-evasion system that helps them detect threats and escape rapidly.
House Centipedes Hunt Firebrats Indoors
House centipedes are among the clearest documented predators of firebrats. These fast-moving hunters emerge from sheltered locations at night and search floors, walls, and other surfaces for small arthropods. Their prey includes firebrats along with silverfish, cockroach nymphs, carpet beetle larvae, spiders, and numerous other household arthropods.
A house centipede does not wait for prey to become trapped in a web. It actively hunts, using its many legs to capture an arthropod before subduing it with venom delivered through modified front appendages. That hunting strategy puts it in direct contact with firebrats because both can be active indoors after dark.
Seeing house centipedes where firebrats are present therefore makes ecological sense, but the relationship can also reveal something less convenient. Frequent house centipede sightings can indicate that enough prey is available to support the predators. In other words, the centipedes may be eating firebrats while simultaneously providing a clue that small arthropods are abundant somewhere in the building.
Spiders Can Catch Firebrats
Spiders are another established predator of bristletails. Firebrats are small enough to become prey for spiders occupying the same indoor spaces, particularly when they leave protective cracks and move across exposed surfaces. Firebrats and related silverfish are documented prey of spiders, alongside predation by other arthropods.
Exactly how the encounter happens depends on the spider. A web-building spider may capture a firebrat that runs into its silk, while an actively hunting spider can pursue small arthropods without using a prey-catching web. Firebrats are quick, however, and their ability to detect disturbances gives them a chance to escape before a predator successfully grabs them.
This predator-prey relationship is one reason the sudden dash of a disturbed firebrat is more than random frantic movement. The insect has sensory systems associated with detecting and escaping terrestrial predators, helping explain why it can disappear into shelter so abruptly when something approaches.
Earwigs Also Prey on Firebrats
Earwigs are omnivores rather than dedicated firebrat hunters, but they are also among the predators known to eat bristletails. Their diet combines decaying organic material with live animal prey, allowing them to take advantage of small insects and other invertebrates when the opportunity arises.
This fits with their broader feeding behavior. Earwigs can act as predators of insect larvae, aphids, and other small invertebrates, so a firebrat small enough to overpower can become another potential meal. The relationship is opportunistic rather than evidence that earwigs specialize in hunting firebrats.
That distinction matters because the presence of one household arthropod should not be treated as a solution to another. An earwig occasionally consuming a firebrat is simply part of the small predator-prey interactions occurring inside and around buildings.
How Do Firebrats Avoid Being Eaten?
Speed is one of a firebrat’s most obvious defenses. When disturbed, it can rapidly run toward a nearby crack or crevice, where its flattened body allows it to disappear into spaces that may be difficult for a larger predator to enter.
There is more happening than fast legs alone. Firebrats have sensory structures associated with their rear appendages that detect air movement and other disturbances. Studies of Thermobia domestica have identified specialized sensory pathways involved in predator evasion. Detecting an approaching threat quickly gives the insect a better opportunity to begin its escape before physical contact occurs.
Their behavior adds another layer of protection. Firebrats spend much of their time concealed and tend to forage when it is dark, reducing the amount of time they remain exposed. None of these defenses makes them immune to predation, but together they help explain how a small, soft-bodied insect can coexist with spiders, centipedes, and other hunters occupying the same building.
Will Natural Predators Get Rid of Firebrats?
Probably not. House centipedes, spiders, and earwigs can remove individual firebrats, but there is no good evidence that simply having these predators in a building will reliably eliminate an established firebrat population. Predators themselves need opportunities to encounter prey, while firebrats spend substantial amounts of time concealed in protected spaces.
It would therefore make little sense to introduce or deliberately preserve unwanted arthropods solely to control firebrats. A house centipede eating several individuals does not address the warm hiding places, accessible food, or other conditions allowing firebrats to persist. If sightings are frequent, investigating what causes firebrats to get into a house is more useful than relying on predators to keep their numbers down.
Natural predation still matters because it shows where firebrats fit within the indoor food web. They are not simply consumers of starches, paper-associated materials, and dead insects. They are also prey themselves, and their presence can provide food for other arthropods sharing the same building.
Questions About Firebrat Predators
Do house centipedes eat firebrats?
Yes. Firebrats are among the documented prey of house centipedes, which actively hunt small arthropods inside buildings.
Do spiders eat firebrats?
Yes. Spiders are natural predators of firebrats and related bristletails, although the likelihood of an encounter depends on the spider and where both animals are living.
Do earwigs eat firebrats?
Earwigs can prey on firebrats. They have a broad omnivorous diet and consume small animal prey rather than specializing exclusively in firebrats.
Does finding a house centipede mean firebrats are nearby?
Not necessarily. House centipedes eat many different arthropods, so their presence does not specifically indicate firebrats. Frequent centipede sightings can, however, suggest that some type of prey is sufficiently abundant to support them.
Should I keep spiders or centipedes around to control firebrats?
Natural predators may eat some firebrats, but they are not a reliable substitute for dealing with an established population. If firebrats are appearing repeatedly, identifying why they are thriving in that location is more useful than depending on incidental predation.