Smokybrown Cockroach

Profile

Scientific name

Periplaneta fuliginosa

Identification

Even dark brown to nearly black body with a solid shield — no figure-eight or banding. Wings extend beyond the abdomen. Nymphs are dark with pale antenna tips.

Appearance

Sleek, glossy, uniformly dark, noticeably shiny under light.

Typical size

Adults about 1.25-1.5 inches (30-38 mm).

Behavior

Nocturnal, flies readily and is attracted to porch and landscape lighting. It loses moisture quickly, so it favors damp, sheltered harborage.

Habitat

Tree holes, leaf-clogged gutters, mulch beds, woodpiles, soffits, attics and shaded exterior walls.

Diet

Decaying plant material, leaf litter, pet food and food residue.

Lifecycle

Egg cases are glued in sheltered outdoor and attic locations; nymphs mature over several months, with population peaks in warm months.

Why it matters

Primarily a contamination and nuisance pest. It does not bite, but attic populations can shed allergen-bearing debris.

DIY considerations

Indoor sprays do nothing about an attic or landscape population. Light management, gutter cleaning and sealing the roof line matter far more.

Professional considerations

Treatment is exterior- and attic-focused, paired with exclusion at soffits, vents and door sweeps.

Signs of activity

• Roaches flying to porch lights or landing on screens after dark
• Droppings and shed skins in attic insulation or soffit corners
• Roaches inside upper-floor rooms with no kitchen activity
• Activity spikes after heavy rain drives them out of saturated mulch

Prevention

• Clean gutters and remove leaf litter against the house
• Screen attic and soffit vents and seal roof-line gaps
• Switch exterior fixtures to warmer, less attractive lighting where possible
• Move woodpiles and stored yard debris away from walls
• Trim tree limbs that touch the roof

Sources

• University of Florida IFAS — Featured Creatures (entomology profiles)
• Alabama Cooperative Extension System (Auburn University) — household pests