The Critical Distinction — Domestic vs. Peridomestic
The single most important thing to understand about cockroach control in North Alabama is that the three species you are most likely to encounter require two completely different management approaches. Treating all three the same way is the most common cockroach management failure in this region — and it is why some homeowners and businesses fight cockroach infestations for months without success.
Identify the species first. German Cockroaches require indoor gel bait, sanitation, and crack-and-crevice treatment. American and Smoky Brown Cockroaches require outdoor habitat modification, perimeter exclusion, and exterior residual spray. Indoor bait alone will not stop American or Smoky Brown cockroaches from continuing to enter from outside. Exterior perimeter spray alone will not eliminate an established German Cockroach infestation. Getting this distinction right is worth more than any specific product choice.
German Cockroach (Blattella germanica)
The German Cockroach is the most important cockroach pest in North Alabama and worldwide — dominant in restaurants, commercial kitchens, multi-unit housing, hospitals, schools, and grocery stores throughout the Huntsville metro. Rutgers NJAES Extension describes it as the most common indoor cockroach "due to its small size, short life cycle, and the ability to develop insecticide resistance." Despite its name, it did not originate in Germany — it is believed to have originated in Southeast Asia and was distributed globally through commerce.
Identification
The adult German Cockroach is small — 1/2 to 5/8 inch long, roughly the size of a dime or penny. NC State Extension describes the adult as "light caramel-colored brown" with two broad, parallel dark stripes running along the pronotum (the shield-shaped section behind the head). These two stripes are the single most reliable adult identification feature. Adults have wings but are poor fliers and rarely use them.
Nymphs are smaller and distinctly darker — dark brown to black — with a single dark stripe running down the back. They are wingless. Nymphs pass through 5–6 molts and range from 1/8 inch (newly hatched) to 9/16 inch (late-stage). In an active German Cockroach infestation, approximately 80% of the population are nymphs at any given time — the adults you see are the minority.
The egg case (ootheca) is light tan, about 5/16 inch long, and contains 30–48 eggs. The female carries her egg case attached to her abdomen until just before hatching — protecting the eggs from environmental insecticides and explaining why single-treatment chemical programs frequently fail against established populations.
Why the German Cockroach is so hard to eliminate
Three biological features make the German Cockroach uniquely difficult to control compared to the other North Alabama species:
- Reproductive speed: the complete life cycle from egg to adult averages 100 days — the fastest of the three North Alabama species. A single female produces 5–8 egg cases in her lifetime, each containing 30–48 eggs. Total lifetime egg production: 200–250 eggs per female. One mated female can theoretically produce up to 10,000 descendants within a year under favorable conditions (Animal Diversity Web).
- Ootheca protection: because the female carries her egg case on her body until just before hatching, the eggs are not exposed to insecticide treatments. Detached oothecae will not hatch unless within 1–2 days of their natural hatching date (Rutgers NJAES). This is why follow-up treatments are essential — newly hatched nymphs must be exposed after the initial treatment.
- Insecticide resistance: German Cockroach populations in North Alabama cities are expected to carry significant resistance to pyrethroid insecticides — the most commonly used class. NCSU Extension advises avoiding regular spray schedules to reduce resistance development and rotating active ingredient classes between treatments. This is why gel bait (a different chemistry class) consistently outperforms perimeter sprays for German Cockroach control.
Where German Cockroaches are found in North Alabama
German Cockroaches are a domestic species — they live, breed, and feed almost exclusively indoors. They are brought in through infested goods (food deliveries, used appliances, boxes, luggage) and spread through multi-unit buildings via shared utility chases and common walls. The primary indoor harborage locations:
- Under and behind refrigerators — warmest area in most kitchens; highest cockroach counts in kitchen inspections (Rutgers NJAES)
- Under and behind stoves — under the stove drawer; between the range body and adjacent cabinets
- Inside lower kitchen cabinets — specifically in corner seams, door hinge areas, and the underside of shelving
- Under the kitchen sink — around all plumbing penetrations; high humidity and food debris
- Bathroom vanity cabinets — around toilet bases, under sinks, in medicine cabinet gaps
- Commercial kitchens throughout Huntsville and Decatur — under steam equipment, in drain floor areas, behind reach-in coolers; any food service operation is at risk
Daytime sightings of German Cockroaches indicate a severe infestation. This species is nocturnal — if cockroaches are visible during the day, the harborage sites are overcrowded and the population is large.
American Cockroach (Periplaneta americana) — The Sewer Roach
The American Cockroach is the largest common cockroach in North Alabama, with adults averaging 4 centimeters (about 1.5 to 2+ inches) in length. Despite its name it is not native to North America — it was introduced from Africa as early as 1625 via Atlantic commerce. UF/IFAS (EENY141) describes it as the most common species found in US city sewer systems, with populations sometimes exceeding 5,000 individuals in a single sewer manhole.
In North Alabama, the American Cockroach is the large reddish-brown roach that homeowners encounter in basements, utility rooms, and occasionally in first-floor living areas — almost always entering from the sewer system or outdoor environment rather than breeding indoors. It is also the "waterbug" or "palmetto bug" of local colloquial language, though those names are applied inconsistently.
Identification
The adult American Cockroach is immediately recognizable by its large size — the largest of the three North Alabama species. Key identification features:
- Color: reddish-brown body with a distinct pale brownish to yellowish-tan border running around the margin of the pronotum — this pale pronotum border is the key distinguishing feature from the Smoky Brown Cockroach, which has no pale border at all
- Size: adults 34–53 mm (approximately 1.5 to 2+ inches); visibly much larger than a German Cockroach
- Wings: both sexes are fully winged; males' wings extend 4–8 mm beyond the abdomen tip; females' wings reach the tip; both sexes are capable of flight in hot, humid conditions — which describes North Alabama summers — though they are generally categorized as poor to moderate fliers
- Antennae: long, slender, uniformly brown, and often longer than the body itself
Why American Cockroaches appear after heavy rain in North Alabama
One of the most common cockroach complaints in North Alabama is large cockroaches suddenly appearing indoors after heavy rainfall. This is almost always American Cockroaches. UF/IFAS notes that American cockroaches "readily found in commercial buildings and food preparation/storage areas; rarely in houses but can occur after heavy rain." The mechanism: heavy rain saturates North Alabama's sewer system, displacing cockroaches from sewer mains and manholes. They migrate indoors through floor drains, plumbing connections, and utility penetrations under hydrostatic pressure.
This is not a sign of poor indoor sanitation — it is a sewer species doing what sewer species do when their underground habitat floods. The management focus should be on drain covers with backflow prevention, exterior exclusion, and outdoor population reduction — not on indoor bait or sprays.
Habitat in North Alabama
| Location | Risk Level | Management Priority |
|---|---|---|
| Sewer mains, manholes, storm drains | VERY HIGH — primary habitat | North Alabama's urban storm and sanitary sewer network provides extensive harborage; cockroaches migrate indoors via floor drains after heavy rain |
| Commercial kitchens, restaurants, food processing | HIGH | Basements, steam tunnels, floor drains, under heavy equipment; Huntsville and Decatur commercial corridors |
| Residential basements and utility rooms | MODERATE | Enter via floor drains and plumbing from sewers; typically transient rather than establishing breeding populations indoors |
| Outdoor landscape in warm months | MODERATE | Hollow trees, woodpiles, mulch beds; outdoor populations bridge to structures via trees and shrubs adjacent to buildings |
Smoky Brown Cockroach (Periplaneta fuliginosa) — North Alabama's Suburban Yard Roach
The Smoky Brown Cockroach is increasingly recognized as one of the most important peridomestic cockroach pests in the southeastern United States — and North Alabama is squarely within its core range. In many suburban Huntsville, Madison, and Hampton Cove neighborhoods with mature landscaping, the Smoky Brown is the most frequently observed cockroach outdoors. It enters North Alabama homes primarily by flying to exterior lights at night, not by coming up through drains.
Its entire ecology is driven by one physiological vulnerability: it loses moisture through its cuticle more rapidly than most other cockroach species. This desiccation sensitivity drives it continuously toward moist, humid, protected microhabitats — mulch beds, leaf litter, hollow trees, and clogged gutters — and explains why habitat modification is the most effective long-term control strategy.
Identification — the uniformly dark pronotum
The Smoky Brown Cockroach is similar in size to the American Cockroach (1 to 1.5 inches) but has a completely different coloration. The single most reliable identification feature:
- Uniformly shiny dark mahogany-brown to black color — on both body and pronotum with NO pale border. The American Cockroach has a distinct yellowish-tan border around the pronotum edge; the Smoky Brown has none. The entire spider is one uniform dark color from head to abdomen tip.
- Wings: both sexes have wings extending past the abdomen; both sexes are strong, capable fliers that actively use their wings at night. This is a critical behavioral difference from the American Cockroach.
- Light attraction: Smoky Brown Cockroaches are strongly and actively attracted to artificial lighting at night — a behavioral trait absent in the other two species. If cockroaches are flying at night and landing near lights, porch fixtures, or lit windows, they are almost certainly Smoky Browns.
Where Smoky Brown Cockroaches live in North Alabama yards
| Habitat | Priority | Why |
|---|---|---|
| Mulch beds within 3 feet of foundation | 🔴 Highest | Moist, protected, organic material mimics natural tree hole microclimate; the most common Smoky Brown harborage around North Alabama residential structures |
| Leaf-clogged gutters | 🔴 Highest | Warm, moist, protected; directly adjacent to roof-level entry points; cleaning gutters removes primary Smoky Brown harborage at the highest-risk entry zone |
| Accumulated leaf litter under shrubs | 🔴 High | Dark, moist, protected; often undisturbed for months; remove and bag seasonally |
| Exterior lights (porch, security, windows) | 🔴 High | Not harborage — but primary night entry route; flying adults land near lit openings and find their way inside; switch to yellow/amber bulbs |
| Tree holes in mature landscaping | 🟡 Moderate-High | Natural primary harborage; mature oak, maple, and pine trees common in North Alabama suburbs; treat visible cavities |
| Soffits, attic eaves, gaps in fascia | 🟡 Moderate-High | Attracted to these sheltered areas; primary structural entry point; seal all soffit gaps and repair rotted fascia |
| Woodpiles near home | 🟡 Moderate | Moist, protected; move woodpiles away from structure and elevate off ground |
Species Comparison — Field Quick Reference
| Feature | German Cockroach | American Cockroach | Smoky Brown Cockroach |
|---|---|---|---|
| Size | Small: 1/2–5/8 inch | Very large: 1.5–2+ inches | Large: 1–1.5 inches |
| Color / key mark | Light brown; 2 dark parallel stripes on pronotum | Reddish-brown; pale yellowish border on pronotum edge | Uniformly shiny dark mahogany; NO pale border anywhere |
| Flight | Has wings; rarely flies | Poor to moderate flier in hot/humid conditions | Strong flier; flies actively at night toward lights |
| Ecology | DOMESTIC — lives and breeds indoors only | PERIDOMESTIC — primary sewer/outdoor species | PERIDOMESTIC — primary outdoor landscape species |
| Primary harborage | Kitchen/bathroom cracks; under appliances | Sewers, floor drains, basements, commercial kitchens | Mulch, leaf litter, tree holes, gutters, soffits |
| How it gets in | Transported in infested boxes, deliveries, used appliances; spreads via shared utility chases in multi-unit buildings | Via floor drains and plumbing from sewer; mass migration after heavy rain | Flies in through lit openings at night; enters via gaps in soffits, vents, eaves |
| Reproductive rate | VERY HIGH — 200–250 eggs/female; 100-day cycle; up to 10,000 descendants/year | LOW — ~150 young/female; 600-day egg-to-adult | MODERATE — ~200 eggs/female; 320–600-day cycle |
| Correct treatment | Indoor gel bait + IGR + sanitation + crack/crevice | Drain covers + perimeter exclusion + outdoor perimeter spray | Outdoor habitat modification + gutter cleaning + light management + exclusion |
| Bug bombs effective? | NO — documented ineffective; avoid | NO | NO |
Health Significance — Why Cockroaches Matter in North Alabama
All three species produce meaningful public health risk through allergen production and mechanical disease transmission. These risks are particularly significant in North Alabama's multi-unit residential housing, restaurant corridors, schools, and healthcare facilities.
Allergen and asthma burden
Cockroach allergens are among the most significant indoor allergens in the United States. The American Cockroach is identified as the fourth most common allergen overall. Research documents that 50–60% of atopic and asthmatic people show intense reactions to cockroach extract, and sensitivity in asthmatic children in heavily infested homes may reach 79% (Animal Diversity Web). The German Cockroach is the most important source of cockroach allergens in urban indoor environments due to its exclusive indoor lifecycle and ability to contaminate every surface in a living space.
Cockroach feces, shed skins, saliva, and body parts all contain allergenic proteins — and these allergens remain active long after the cockroach population has been eliminated. This means professional cleaning is needed after infestation resolution, and HEPA-filter vacuuming is preferred over standard vacuuming (which can aerosolize allergens). Asthmatic children in North Alabama's urban multi-unit housing are at disproportionate risk.
Disease transmission
Cockroaches are mechanical vectors — they pick up pathogens on their bodies and legs from contact with sewage, garbage, and feces, then transfer those pathogens to food preparation surfaces, eating utensils, and stored food. Documented transmitted pathogens include Salmonella, Staphylococcus aureus, E. coli, Streptococcus, Klebsiella pneumoniae, and multiple intestinal parasites. The German Cockroach has additionally been documented as a vector of antibiotic-resistant bacteria including MRSA, particularly in hospital and institutional settings.
NC State Extension states directly that "the bacterial flora transmitted by German cockroaches presents a serious epidemiological problem" — particularly in food service environments and low-income housing corridors in North Alabama's urban core.
Signs of Infestation — What to Look For
Early detection is critical, especially for the German Cockroach whose exponential population growth means a small infestation becomes severe within weeks. A systematic inspection with a bright flashlight is the essential first step.
| Sign | German Cockroach | American Cockroach | Smoky Brown Cockroach |
|---|---|---|---|
| Droppings | Black or dark brown; resemble coffee grounds or black pepper; along cracks, inside cabinet hinges, under appliances | Larger; dark brown cylindrical with ridged sides and blunt ends; near floor drains, basement areas, under sinks | Similar to American cockroach; found in outdoor harborage — mulch, gutters, at entry points |
| Egg cases (oothecae) | Light tan; small (5/16 inch); often attached near harborage or dropped shortly before hatching | Dark reddish-brown to black; 3/8 inch; often glued to surfaces near food or water | Dark brown; ~1/2 inch; found in outdoor harborage areas and at entry points |
| Shed skins | Translucent brown skins accumulate in harborage; 5–6 per nymph before adult | Larger cast skins along travel routes and basement areas | Found primarily in outdoor harborage and at structural entry points |
| Daytime sightings | Severe infestation indicator — nocturnal species visible in daylight means harborage is overcrowded | Suggests large outdoor/sewer population; check drains | Uncommon; primarily nocturnal; primary sighting is adults flying to lights at night |
| Odor | Sweet, musty, oily smell in heavily infested areas; nauseating in severe cases | Musty, oily smell near sewer entry points | Similar musty/oily odor in outdoor harborage |
| Best monitoring placement | Under sink, near stove, behind refrigerator, inside lower cabinets | Near floor drains, basement plumbing, external utility entry points | Near exterior lighting, in garage, at soffit entry points, in attic access areas |
Sticky traps (glue boards with pheromone lure) placed in key locations for 24–48 hours provide an accurate picture of infestation extent and species composition before any treatment begins. Rutgers NJAES notes that dampening the bread portion of a trap with beer "significantly increases the effectiveness" for German Cockroach monitoring. For peridomestic species, place traps near floor drains (American) and near exterior entry points and garage areas (Smoky Brown). Count and compare catches between locations to identify the highest-density harborage areas and prioritize treatment there first.
IPM for German Cockroaches — The Gel Bait Approach
Integrated Pest Management for German Cockroaches combines inspection, sanitation, exclusion, and targeted chemical treatment. Rutgers NJAES Extension states clearly: "the goal of cockroach management should be elimination" and "the most effective formula is bait." Here is the complete approach in the correct sequence.
Inspect and monitor
Deploy sticky traps in all harborage locations. Read after 24–48 hours. Identify highest-catch areas — these are your primary treatment targets. Continue monitoring throughout the program to measure population decline.
Sanitation
Remove food and water sources the cockroaches depend on. Clean under and behind all appliances; fix all plumbing leaks; store food in hard-sided containers; remove pet food and water overnight; empty kitchen trash cans daily; HEPA-vacuum to remove feces, shed skins, and egg cases.
Seal harborage
Caulk cracks and crevices along countertops, baseboards, and around all plumbing penetrations. In multi-unit housing, seal all penetrations between units through common walls and utility chases — this is where German Cockroaches move between apartments.
Apply gel bait (primary chemical method)
Apply pea-sized dots of gel bait directly into harborage sites — inside crack openings, cabinet hinge areas, under sink plumbing, behind refrigerator. Use approximately 10–30 grams for a typical apartment. Active ingredients to rotate: fipronil, abamectin, indoxacarb, hydramethylnon, dinotefuran. Do not apply bait near repellent insecticide sprays — repellents reduce bait uptake.
Add IGR for chronic infestations
Insect Growth Regulators (hydroprene, methoprene, pyriproxyfen) do not kill adults but prevent nymphs from maturing and females from producing viable egg cases. Essential for severe or multi-month infestations; best used in combination with bait for long-term population suppression.
Follow up every 2–4 weeks
Inspect and re-treat until no cockroaches are found over a 4-week period. Rotate bait active ingredients between visits to prevent resistance development. Trap monitoring should show decreasing catches after each treatment cycle — if it doesn't, reassess harborage identification and bait placement.
Total release aerosol foggers are consistently documented as ineffective for cockroach control. Rutgers NJAES Extension explicitly states: "Total release aerosols, also referred to as 'bug bombs' are not effective and should be avoided." Foggers do not penetrate cracks and crevices where cockroaches actually live — they push cockroaches deeper into harborage. They expose occupants to insecticide while leaving the cockroach population essentially intact. The only scenario where a fogger may serve any purpose is as a flushing agent during initial inspection — not as a primary control method.
IPM for American & Smoky Brown Cockroaches — Treat the Outside First
Because the American and Smoky Brown Cockroaches are outdoor species that enter structures opportunistically, the primary management focus must be the outdoor population and the structural entry points. Indoor treatment alone is insufficient — new cockroaches will continue to enter from the unmanaged outdoor population as long as the exterior conditions remain favorable.
Habitat modification — the most important step
| Action | American Cockroach | Smoky Brown Cockroach |
|---|---|---|
| Mulch management | Moderate benefit | PRIMARY action — mulch is the most common Smoky Brown harborage in North Alabama yards. Pull organic mulch back 12–18 inches from foundation; consider switching to gravel or synthetic mulch near the structure. |
| Leaf litter removal | Moderate benefit | PRIMARY action — bag and remove accumulated leaf litter from under shrubs and along fence lines; do not compost near the structure. |
| Gutter cleaning | Less critical | CRITICAL — clogged gutters are among the most important Smoky Brown harborage sites in North Alabama, positioned directly adjacent to roof-level entry points. Clean minimum twice per year; install gutter guards. |
| Outdoor lighting | Moderate benefit | HIGH benefit — switch exterior porch, security, and flood lights to yellow, amber, or sodium vapor spectrum bulbs. Smoky Brown Cockroaches are strongly attracted to white and blue-spectrum lights; switching bulbs is one of the most effective Smoky Brown prevention measures. |
| Drain management | CRITICAL — install drain covers with backflow prevention on all floor drains; keeps sewer cockroaches from entering via plumbing | Less critical |
| Woodpile management | Moderate | HIGH — move woodpiles at least 20 feet from structure; elevate off ground; store on a rack |
| Eliminate outdoor water | HIGH — requires free water; fix leaking outdoor faucets and eliminate standing water | Moderate — desiccation-sensitive; removing moisture makes landscape less suitable |
Exclusion — sealing entry points
- Seal all foundation cracks and gaps with concrete, mortar, or appropriate caulk
- Install door sweeps on all exterior doors; ensure a tight seal with no gap at the base
- Screen all vents — soffit vents, crawl space vents, and attic vents — with 1/4-inch galvanized hardware cloth
- Seal all utility penetrations where pipes, conduit, and wires enter the structure
- Repair and seal cracks in soffits and fascia boards — critical for Smoky Brown exclusion
- Install backflow prevention drain covers on all floor drains — critical for American Cockroach exclusion
Exterior chemical treatment
Apply residual insecticide spray to the structure perimeter — 3 to 6 feet up the exterior wall and 3 to 6 feet out from the foundation — and to mulch beds, woodpile areas, and other harborage. Non-repellent active ingredients (chlorpyrifos, carbamates, or non-repellent pyrethroids) are more effective than repellent pyrethroids because cockroaches contact the treated surface before avoidance behavior is triggered. Reapply every 30–90 days. Supplement with tamper-resistant outdoor bait stations placed in mulch beds and near harborage areas.
Frequently Asked Questions
Sources & References
- Wang, Changlu. German Cockroach. Rutgers NJAES Cooperative Extension Fact Sheet FS1322. July 2020. njaes.rutgers.edu. Most common indoor cockroach due to small size, short life cycle, and insecticide resistance; egg case 8mm x 3mm x 2mm; 40 eggs; carried by female until just before hatching; detached ootheca will not hatch unless within 1–2 days; nymphs 3–14mm; adults 13–16mm; two dark parallel stripes on thorax; males slender/tapered; females wider/rounded; 80% nymphs in active populations; limiting factor is temperature below 59°F; bread dampened with beer increases trap effectiveness; gel bait as most effective formula; fipronil, abamectin, indoxacarb, hydramethylnon, dinotefuran; 10–30g for typical apartment; total release foggers not effective and should be avoided.
- Wada-Katsumata, A. and Hayes, C. Biology and Behavior of the German Cockroach. NC State Extension. content.ces.ncsu.edu. "Light caramel-colored brown with two longitudinal black stripes on pronotum"; "dime/penny sized; fast moving"; asthma-inducing allergens; transported through human activities; moves between apartment units; "bacterial flora transmitted by German cockroaches presents a serious epidemiological problem"; vectors antibiotic-resistant bacteria; avoid regular spray schedules to reduce insecticide resistance.
- Antani, K. and Burgeson, A. Blattella germanica. Animal Diversity Web. University of Michigan. animaldiversity.org. Origin believed Southeast Asia; cosmopolitan; weight 0.1–0.12g; 4–8 egg capsules of 30–48 eggs; capsules hatch ~28 days; 6–7 nymphal stages over 6–31 weeks; up to 10,000 descendants from a single female; breed continuously; 3–4 generations simultaneously; food habits (human foods, starches, sweets, grease; also soap, toothpaste, glue; eat dead organisms).
- Texas A&M Urban Entomology. German Cockroach. urbanentomology.tamu.edu. High reproductive rate; one of most important structure-infesting cockroaches; females carry oothecae until ready to hatch; light brown; 1/2 to 5/8 inch; gel baits applied in pea-sized applications into areas where roaches live; exterior application unneeded; thorough treatment and follow-up visits necessary.
- Stetson, B. Periplaneta americana. Animal Diversity Web. University of Michigan. animaldiversity.org. Native to Africa; cosmopolitan; prefers 84°F; most common sewer species in US cities; enters via sewers/drains, mass migration during warm weather; rests near water pipes; 34–53mm; reddish-brown with pale yellowish band around pronotum; males' wings extend 4–8mm beyond abdomen; 9–10 oothecae per female; 14–16 eggs per ootheca; ~600-day development; adult females live 440 days at 70°F; ~150 young per female lifetime; 4th most common allergen; 50–60% atopic/asthmatic show intense reactions; 79% sensitivity in severely infested homes.
- Nair, S.; Gouge, D.H.; and Li, S. The American Cockroach. University of Arizona IPM Newsletter. September 2022. Largest domestic cockroach; worldwide; adults ~1.5 inches; long slender antennae often longer than body; shield-like pronotum has yellowish-brown or tan border; both sexes capable of flight in warmer months; frequently associated with sewers; runs very fast to escape predators.
- Barbara, K.A. American Cockroach. UF/IFAS EENY141/IN298. November 2024. Introduced from Africa ~1625; largest common peridomestic cockroach; average 4cm; most common species in US city sewer systems; populations greater than 5,000 in individual sewer manholes; 47 Periplaneta species; basements, sewers, steam tunnels, drainage; commercial buildings and food preparation areas; rarely in houses but can occur after heavy rain; mass migrations common; ootheca dark reddish-brown; ~8mm long; 16 eggs per case; 9–10 oothecae per female; egg to adult average 600 days; adult life span another 400 days; females produce average 150 young; diet omnivorous (decaying organic matter; prefers sweets; also paper, boots, hair, bread, fruit, book bindings, fish, leather).
- OSU Extension. Smokybrown Cockroach. extension.okstate.edu. May 2021. Prevalent in leaf litter, shrubs, trees, tree holes, woodpiles, garages, crawl spaces, attics, gutters; can survive in sewers; egg to adult ~320 days; ootheca 1/2 inch, dark brown, incubation averages 45 days; ~20 nymphs per ootheca; adults live 2–6 months; strong fliers attracted to lights at night; up to 1.5 inches; uniformly shiny dark-brown to mahogany.
- UF Department of Entomology. Smokybrown Cockroach. entnemdept.ufl.edu. 2005. 25–32mm; uniformly dark mahogany-brown; NO pale border behind head — diagnostic; both sexes wings extending past abdomen; both good fliers attracted to light; ~10 egg cases per female; ~20 eggs per case; egg to adult averages ~600 days; adults average 215 days; abundant outdoors; tree holes, woodpiles, attics; readily enters via lit openings; common in southern US north to Midwest.