Black vs. Brown Ants: Understanding the Difference and How to Deal with Them

Peta Stewart • November 28, 2025

Have you ever wondered why ants seem to invade your home at the worst possible times?


Whether it’s a line of tiny black ants marching across your kitchen bench or brown ants building mounds in your garden, these pests are more than just a nuisance. While both types of ants are common in Perth, they have distinct behaviours and nesting habits that require different approaches for control. Understanding the difference between black and brown ants is the first step to preventing a major infestation. Here’s what you need to know to identify and deal with them effectively.


Identifying Black Ants vs. Brown Ants


Physical Characteristics

Black ants and brown ants can appear similar at first glance, but a closer look reveals distinct differences. Black ants, such as the common black house ant, are generally smaller and glossy in appearance, with a smooth, dark exoskeleton. Brown ants, often referred to as coastal brown ants, tend to be slightly larger, with a light to reddish-brown colouring and a more matte finish. Their antennae and body segments are also more pronounced, which helps pest control experts quickly identify them. Spotting these differences can assist homeowners in choosing the right treatment method for each species.


Behaviour Differences

The behaviours of black and brown ants vary, especially when it comes to nesting and foraging habits. Black ants are typically attracted to food scraps inside the home, particularly sweets and greasy residues, making kitchens a hotspot for infestations. Brown ants, on the other hand, are notorious for building nests in soil, under pavers, or in garden beds. They create large colonies that can quickly spread outdoors and even find their way inside if left unchecked. Recognising these behaviours helps determine the source of the problem and where to focus control efforts.


Signs of Infestation

Identifying early signs of an ant infestation can prevent larger problems later. Trails of ants leading to food sources, soil mounds in gardens, or ants congregating near pet food bowls are common indicators. Black ants are often seen forming straight, organised lines, while brown ants might appear in scattered patterns outdoors. Seasonal patterns also play a role, with activity increasing during warmer months. Early intervention with ant pest control for Perth homes is essential to stop colonies from growing too large, and professional advice can make a big difference in long-term prevention.


Why Ant Infestations Occur in Perth Homes


Climate Influence

Perth’s warm and dry climate creates the perfect conditions for ants to thrive. During the hotter months, ants often seek cooler, shaded areas within homes or gardens, while in winter, they move indoors for warmth and shelter. The seasonal shifts in temperature drive ants to establish nests close to food and water sources. This explains why homeowners often notice increased ant activity during the transitional seasons of spring and autumn. Understanding how the local climate influences ant behaviour is key to implementing effective prevention strategies year-round.


Common Attractants

Ants are constantly on the hunt for food and water, and kitchens or pantries provide a readily available feast. Sugary residues, crumbs, and even pet food are some of the biggest culprits for attracting ants indoors. Outdoors, fallen fruit, compost bins, and uncovered rubbish can also encourage large colonies to form. Once a reliable food source is located, ants leave pheromone trails to guide the rest of the colony directly to the target, making it essential to act quickly before the infestation spreads.


Structural Entry Points

Even the smallest crack in a wall or gap around a window can serve as an entry point for ants. They are highly skilled at finding weaknesses in building structures, particularly in older homes. Gaps around pipes, foundations, or doors can give them easy access to kitchens and living spaces. Regular inspections and sealing potential entry points are crucial steps to keeping ants outside where they belong.


The Importance of Prevention

Preventing infestations is always easier than dealing with an established colony. Regular cleaning, prompt disposal of food scraps, and sealing all potential entry points can make a big difference. Professional assistance ensures thorough inspections and treatment plans tailored to your property’s needs.


How to Control Black and Brown Ants Effectively


DIY Approaches

There are several simple, at-home methods to deter ants before they become a serious problem. Natural repellents like vinegar, lemon juice, or essential oils such as peppermint can disrupt ant trails and discourage them from entering. Boiling water can be poured onto outdoor nests, while sealing food in airtight containers and cleaning up crumbs can reduce their attraction indoors. However, these do-it-yourself approaches are typically short-term solutions. Without addressing the source of the colony, ants often return, making professional intervention necessary for long-lasting results.


Professional Pest Control

For more severe infestations, calling a professional pest control company is the most reliable way to eliminate ant colonies effectively. Experts have the tools, experience, and knowledge to identify the species and deliver treatments that target both the visible ants and the hidden nest. Stewarts Pest Control, with its decades of expertise, offers affordable ant pest control services designed for Perth homes and businesses. Their tailored approach ensures that the treatment is both effective and safe, reducing the likelihood of re-infestation. Professional services also save time and minimise the frustration of repeated DIY attempts.


Ongoing Maintenance and Advice

Controlling ants doesn’t end with one treatment. Ongoing maintenance and prevention strategies are critical to keeping ants away for good. Professionals can offer advice on the best ways to safeguard your home, such as sealing cracks, improving sanitation, and using targeted baits. Routine inspections can help identify potential ant activity early, before it escalates into a bigger problem. Combining professional solutions with proactive measures around your home provides the most effective long-term protection against black and brown ants.


Ant Pest Control for Kitchens and Gardens


Kitchens

Kitchens are one of the most common hotspots for ant infestations due to the abundance of food and water. Black ants, in particular, are drawn to sugary substances, crumbs, and grease that are often left behind on countertops or floors. Even the smallest spills or unsealed food containers can attract an entire trail of ants in a matter of hours. Regular cleaning is essential, but it only goes so far. Professional treatments focus on eliminating the entire colony, not just the ants you see. This targeted approach ensures that the infestation is eradicated at its source, preventing ants from returning and contaminating food areas.


Gardens

Brown ants thrive in outdoor environments, making lawns, garden beds, and pathways prime locations for their nests. They build extensive colonies underground, often resulting in unsightly mounds that can damage grass and plants. In addition to being an eyesore, these colonies can spread quickly, with worker ants foraging into nearby homes for food. Garden treatments are designed to control ant populations without harming your plants or beneficial insects. By targeting nesting sites directly, professional pest control solutions ensure the ants are removed while preserving the health of your outdoor spaces.


Why Target Both Areas

Focusing on just one area of your property often leaves you vulnerable to ongoing infestations. Ants can quickly move between your garden and kitchen if they find a steady food supply, which is why a combined approach works best. Professional ant pest control for kitchens and gardens uses safe, effective methods tailored for both indoor and outdoor environments. This integrated strategy not only removes existing colonies but also creates long-term barriers to keep ants at bay. Stewarts Pest Control’s experience ensures your home and garden are fully protected, giving you lasting peace of mind.


Safe and Eco-Friendly Ant Control Options


Why Safety Matters

When dealing with ant infestations, safety is a top priority for homeowners. Harsh chemicals can pose risks to children, pets, and even indoor air quality if not applied correctly. The goal is to control ants without creating new hazards around the home. Professional pest control services now prioritise treatments that are both effective and safe, ensuring your family’s wellbeing while still achieving strong results. This focus on safety is especially important for kitchens and gardens, where food, plants, and outdoor play areas could otherwise be exposed to harmful residues.


Eco-Friendly Solutions

Modern pest management has evolved to include eco-friendly methods that minimise environmental impact. Treatments such as low-toxicity baits, non-repellent sprays, and natural deterrents target ants while being safe for the surrounding ecosystem. Integrated Pest Management (IPM) is a key approach, combining physical barriers, habitat adjustments, and selective treatments to deliver long-lasting results. By using safe and eco-friendly ant pest control, homeowners can enjoy peace of mind knowing that their family, pets, and garden are protected. Eco-friendly solutions also help prevent ants from returning by focusing on long-term prevention rather than just short-term elimination.


Why Professional Help Is More Effective

While DIY ant control methods can offer temporary relief, they often fail to address the root cause of an infestation. Professional pest control services provide effective ant pest control solutions by targeting the entire colony, including the queen, to stop reproduction and further spread. Stewarts Pest Control combines its decades of expertise with modern, eco-conscious methods to ensure the safest and most reliable results. Their treatments are tailored to suit the unique needs of each property, balancing effectiveness with environmental responsibility. With the right professional support, you can eliminate ants while maintaining a healthy home and garden.


Ready to Win the Battle Against Ants?



Are you tired of dealing with persistent ant trails invading your kitchen or brown ant mounds ruining your garden? 

Knowing the difference between black and brown ants is only the first step—effective treatment requires a combination of knowledge, precision, and professional expertise. With over 70 years of experience, Stewarts Pest Control provides tailored solutions that protect your home and outdoor spaces. Whether you need fast treatment or long-term prevention, their trusted team is ready to help. Contact Stewarts today and take the first step toward a pest-free home with reliable, eco-friendly ant control.



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