Dubia roaches cannot climb glass. They lack a sticky foot pad (called an arolium) that many other insect species use to grip smooth vertical surfaces, so clean glass and smooth plastic walls are effective barriers at every life stage, from tiny nymphs to full-grown adults.
That said, there are real-world conditions that can undermine this natural limitation. If you’re housing dubias as feeders or breeding them, understanding the specifics will help you avoid surprises.
Why Dubia Roaches Can’t Climb Smooth Surfaces
Most climbing insects have a small adhesive pad between their claws that lets them stick to polished surfaces the way a gecko sticks to a wall. Dubia roaches never develop this pad. Without it, their feet simply slide on glass, smooth plastic tubs, and similar materials. This is true for nymphs, adult females, and adult males alike, which is one reason dubias are so popular as feeder insects compared to species like lobster roaches or turkestan roaches that can scale almost anything.
When They Can Escape Anyway
The fact that dubias can’t climb glass doesn’t mean they can’t escape. There are several common situations where keepers discover roaches outside their enclosures.
Silicone seams: Glass aquariums are sealed at the corners with silicone caulk, and that rubbery surface gives dubia roaches enough grip to walk straight up. If you’re using a fish tank, the interior corner seams are a known escape route.
Dirty or scratched walls: A buildup of dust, food residue, or frass on the inside of a container creates a textured layer dubias can grip. Scratched plastic has the same effect. Some colored plastic tubs have a slightly rougher surface texture than clear ones, and those can be enough for roaches to gain traction. When choosing a storage tub, look for one with noticeably slick interior walls and avoid soft plastics that scratch easily.
Egg crate bridges: Stacking egg crate or cardboard hides too close to the rim gives roaches a simple staircase to the top. Keep hides at least a few inches below the enclosure’s edge.
Male flight: Adult male dubias have functional wings. They rarely fly in any sustained way, but they can flutter and launch themselves short distances, especially when startled. Males are the most likely escape artists, not because they climb but because they can get enough lift to clear a short wall or land on the rim of an open container.
Best Enclosure Materials
Glass aquariums (10 gallons or larger) and smooth plastic tubs (40 quarts or larger) are the standard choices. Both work well as long as you keep a few things in mind.
- Glass aquariums have perfectly smooth walls, but the silicone corner seams are climbable. A secure mesh or screen lid solves this. Make sure it fits tightly with no gaps.
- Smooth plastic tubs are lightweight, cheap, and stackable. Choose clear, hard-sided tubs over soft or textured colored ones. If you can drag your fingernail across the interior and feel resistance, roaches may be able to grip it too.
Whichever container you use, a well-fitting lid is the real line of defense. The smooth walls simply make the lid’s job easier by preventing roaches from reaching it in the first place. Ventilation holes drilled in the lid or sides should be smaller than your smallest roach.
What Happens if One Escapes
A stray dubia roach in your house is unlikely to start an infestation. Dubias need consistent warmth (ideally 70°F to 90°F for growth and breeding) and moderate humidity (40% to 60%) to reproduce. Most homes, especially in temperate climates, don’t stay warm or humid enough to support a breeding colony. A single escaped roach will typically hide, fail to find a mate or suitable conditions, and die within months. They’re also relatively slow and not particularly skilled at navigating open environments compared to pest species like German cockroaches.
That said, keeping escapes to a minimum is still worthwhile. A secure lid, clean enclosure walls, and egg crate positioned well below the rim will handle the vast majority of containment needs without any special barriers or petroleum jelly on the walls.