Encountering a large spider inside your home can be startling, but the presence of a Huntsman spider is a common occurrence in many warmer, subtropical regions. While their size may be intimidating, these arachnids are generally shy and non-aggressive toward humans, preferring to flee rather than confront. They are beneficial hunters that control household insect populations, but if their presence is unwelcome, there are several practical, humane steps you can take to manage their presence and prevent their entry.
Identifying the Huntsman Spider
The Huntsman spider is easily recognizable due to its impressive size, with a leg span that can reach up to 30 centimeters in some species. Their coloration typically ranges from brown to gray, often with mottled markings that allow them to blend into natural environments. A distinguishing physical feature is their laterigrade leg orientation, meaning their legs are splayed out sideways like a crab, which is an adaptation for speed and rapid movement across surfaces.
Unlike many other common house spiders, Huntsman spiders do not build webs to capture prey; they are active hunters that rely on speed and agility to pursue insects. They possess a flat body structure, which enables them to squeeze into tight crevices, such as behind wall hangings or under furniture. Their venom is considered low-risk to humans, and bites are uncommon, typically occurring only when the spider feels trapped or is accidentally handled.
Immediate Removal Techniques
The most recommended approach for removing a Huntsman spider from an indoor space is a non-lethal catch-and-release method, often referred to as the cup-and-card technique. This process requires a clear, sturdy container, such as a large glass or plastic tub, and a stiff piece of paper or thin cardboard. Approaching the spider calmly is important, as sudden movements may cause it to dart away quickly.
Slowly place the container over the spider, ensuring the opening is flush against the surface where the spider is resting. This safely encloses the spider without causing it harm. Next, gently but firmly slide the cardboard piece between the surface and the container’s rim, creating a secure lid that traps the spider inside.
Once secured, slowly flip the container over, keeping the cardboard pressed against the opening, to transport the spider outside. Release the spider a significant distance from the home, ideally in a sheltered area like a woodpile or a garden shed, so it does not immediately return indoors. For individuals fearful of close contact, an alternative is using a soft broom to gently guide the spider toward an open door or window.
In situations where the spider is in a difficult-to-reach area, a strong vacuum cleaner with a hose attachment can be used for removal. This is a last resort if the catch-and-release method is not feasible, and the vacuum bag or canister should be immediately emptied outside. Chemical sprays are not recommended due to their limited effectiveness against large spiders and the introduction of unnecessary toxins into the living space.
Preventing Indoor Entry
After removing an existing spider, implementing structural exclusion methods is the most effective long-term strategy to prevent future indoor encounters. Huntsman spiders are adept at flattening their bodies, allowing them to enter a home through surprisingly small gaps. Start by inspecting and sealing all visible cracks and crevices along the foundation, walls, and around utility pipes using caulk or foam sealant.
Inspect all doors and windows, ensuring insect screens are intact and weather stripping is properly installed at the bases of exterior doors. A tight seal under a door is particularly important, as Huntsman spiders often enter along the ground level. Reducing exterior clutter, such as woodpiles and debris close to the foundation, eliminates the sheltered habitats they prefer, making the surrounding environment less inviting.