cockroach
Enable an AI agent to recognise a cockroach, assess its condition and encounter context, and choose proportionate observation, care, containment or management actions.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to recognise a cockroach, assess its condition and encounter context, and choose proportionate observation, care, containment or management actions.
A hemimetabolous insect of order Blattodea other than the eusocial termites: typically cursorial, dorsoventrally flattened, with a pronotal shield covering most of the head, long filiform antennae, chewing mouthparts, and (in most species) tegminous forewings; the vernacular covers both free-living taxa and the few synanthropic species that dominate pest, allergen, and feeder-insect practice.
It can be Observe, photograph and measure diagnostic features with minimal disturbance.; Assign or revise an identification and request expert review when evidence is insufficient.; Monitor activity, moulting and egg-case observations over time.; Select suitable temporary containment or captive care using verified species requirements.; Assess whether to leave undisturbed, contain, seek identification or refer the encounter to a premises-management process..
Distinguishing features
Inspect the combination of a flattened body, long antennae and a shield-like pronotum partly covering the head; record which features are visible rather than identifying from silhouette alone.
Check for enlarged jumping hind legs and a prominently exposed head when distinguishing a suspected cockroach from a cricket.
Inspect wing-cover texture and arrangement when distinguishing an adult from a beetle; an apparently hard-backed outline alone is insufficient.
Use antennae, paired terminal appendages and overall body form to evaluate wingless candidates; absent wings alone do not distinguish a cockroach nymph from another insect.
For a possible termite, record identification evidence separately from registry placement rather than silently resolving the taxonomic and ordinary-language boundary.
Scope
+ Evidence supporting cockroach identification and any species assignment
+ Egg-case association, nymph or adult stage, and reproductive evidence
+ Body integrity, activity, moulting evidence and viability
+ Immediate shelter, food, water and human-contact relationships
+ Individual observation, husbandry, containment and management decisions
- Building-wide infestation extent and population dynamics
- The building, drainage system or habitat as a managed asset
- Disease diagnoses and attribution of illness to an encounter
- Pesticide products, application programmes and regulatory approvals
- Taxonomic classification systems and species-wide ecological accounts
Characteristics
- Identification and confidence
- suspected cockroach | supported cockroach identification | species supported | unresolved; evidence and authority recorded Species-dependent care and management require stronger evidence than a general resemblance.
- Body length
- mm, excluding antennae and terminal appendages; record method Supports identification and developmental assessment when combined with other evidence.
- Diagnostic appearance
- pronotum markings, body colour, antenna form, leg form and terminal appendages; observed | obscured | absent Preserves the visible evidence needed to review an identification.
- Developmental stage
- nymph | adult | uncertain Changes the interpretation of size, wing development and reproductive capacity.
- Wing development
- absent | pads visible | shortened wings | developed wings | obscured Supports stage and species assessment without treating wing presence as proof of flight capability.
- Observed activity
- walking | climbing | flying | feeding | hiding | immobile | other; time and conditions recorded Supports immediate handling decisions and prevents one observation from becoming a permanent behavioural claim.
- Physical condition
- apparently intact | injured | possible recent moult | dead | uncertain Separates observable condition from unsupported diagnoses.
- Reproductive evidence
- egg case visibly attached | egg case nearby | no egg case observed | uncertain Distinguishes direct reproductive evidence from an unverified association.
- Encounter setting
- location, substrate, shelter, nearby food or water, and captive or free-living context Helps distinguish an incidental encounter from a husbandry or premises-management concern.
- Observation temperature
- °C at the observation location, if measured Provides context for activity and condition without assuming a universal suitable temperature.
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.cockroach
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 18 findings · 28 questions.
Cockroach identification Evidence that the observed animal is a cockroach and support for a narrower identification.
Look-alikes and differences between life stages can change both identification and permissible action.
Visible diagnostic evidence
Observable anatomy and the limits of the available view.
Cockroach body pattern
Record the combination of head coverage, body profile, antennae, legs and terminal appendages supporting recognition.
- Which diagnostic features are visible, and which are hidden, damaged or unresolved? measurement
- What observed feature distinguishes this candidate from a cricket, beetle or other plausible look-alike? boundary
Identification resolution
The narrowest defensible identification and its supporting evidence.
Supported taxon
Keep a provisional cockroach identification separate from an evidenced species determination.
- What identification key, specialist determination or comparison supports the assigned taxon? provenance
- Can the available specimen and life stage support species identification, or must the identification remain broader? boundary
Development and reproduction Developmental and reproductive evidence relevant to this individual.
Nymphs, adults and recently moulted individuals can differ in appearance and handling needs.
Stage and moult
Evidence for developmental stage and recent or ongoing moulting.
Stage evidence
Assess stage from multiple features without equating winglessness with immaturity.
- What combination of size, wing development and species-specific features supports nymph or adult status? definition
- Is pale appearance accompanied by a witnessed moult or associated shed skin, or is its cause unresolved? provenance
Egg-case association
Direct and indirect evidence connecting an egg case to the individual.
Reproductive observation
Record attachment, deposition or proximity without inferring parentage or viability from proximity alone.
- Was an egg case observed attached to or deposited by this individual, or only found nearby? provenance
- What evidence supports any claim about egg-case viability or hatching status? measurement
Condition and capabilities Current physical condition and directly observed movement.
Immobility, injury and developmental changes require different interpretations and responses.
Integrity and viability
Visible damage and evidence for whether the animal is alive.
Condition assessment
Distinguish observation from diagnoses such as poisoning, dehydration or disease.
- What movement, posture, visible injury or missing appendages were observed, and under what conditions? measurement
- What further non-injurious observation is needed before classifying an immobile individual as dead? action
Movement and escape
Observed locomotion relevant to observation and containment.
Demonstrated mobility
Record climbing, running or flight with the substrate and conditions under which it occurred.
- Has this individual been observed climbing the relevant surface or flying, rather than merely possessing wings? measurement
- What enclosure openings or surfaces need adjustment given the observed mobility and body size? action
Habitat and encounter The immediate environmental relationships that make the encounter interpretable.
A cockroach in leaf litter, a breeding enclosure or a food-preparation area presents different decisions.
Microhabitat use
Observed shelter and resource use at the encounter location.
Shelter and resources
Separate demonstrated feeding or shelter use from nearby potential resources.
- Where was the individual found, and was it actually feeding, drinking or occupying a refuge? measurement
- Which environmental conditions were measured, and which were inferred from the setting? provenance
Human-contact context
Evidence connecting this encounter to captive care or a premises concern.
Encounter significance
Assess the individual encounter without treating one sighting as proof of an established infestation.
- Is the individual intentionally captive, a possible escapee, or free-living with unknown origin? provenance
- What additional evidence would justify referring this sighting to a population or infestation model? boundary
Care and intervention Evidence and constraints governing action toward this cockroach.
Appropriate treatment depends on identification, condition, setting and the purpose of intervention.
Temporary care
Requirements for holding or maintaining the individual when justified.
Containment and husbandry
Select containment and care from verified requirements while preserving unresolved species uncertainty.
- What verified guidance supports the proposed ventilation, moisture, temperature, shelter and food conditions? provenance
- What temporary holding arrangement is appropriate while identification or care requirements remain unresolved? action
Intervention choice
The purpose, authority and evidence supporting a proposed action.
Proportionate response
Connect observation, containment, relocation or management referral to the actual encounter and applicable constraints.
- What observed problem or care objective would the proposed action address? action
- What species, ownership, ecological or local restrictions must be resolved before relocation or control? boundary
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- German cockroach (Blattella germanica) - the principal indoor, heat-associated pest worldwide
- American cockroach (Periplaneta americana) - large peridomestic species of sewers, basements, and food plants; often called palmetto bug in the US South
- Oriental cockroach (Blatta orientalis) - cool, damp indoor and basement pest of temperate buildings
- Brown-banded cockroach (Supella longipalpa) - drier indoor rooms, furniture, and electronics
- Smokybrown and Australian cockroaches (Periplaneta fuliginosa, P. australasiae) - peridomestic Periplaneta of warm climates
- Asian cockroach (Blattella asahinai) - outdoor Blattella that flies to lights; often confused with German
- Wood cockroaches (Parcoblatta and related outdoor natives) - accidental indoor visitors that do not form kitchen colonies
- Feeder and pet blaberids (Blaptica dubia, Gromphadorhina portentosa and allies) - herpetoculture, education, and display rather than structural pests
- Which of these kinds and varieties hold for the sense of cockroach this model covers, and on what evidence? provenance
Identifiers and schemes
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Wikidata - Q21120 - Item for the vernacular grouping 'cockroach' (non-termite Blattodea as treated in general reference).
- NCBI Taxonomy - 85823 - Taxid for order Blattodea, which also includes termites; species of pest practice have their own taxids (e.g. Blattella germanica 6973).
- EPPO Code - BLATGE | PERIAM | BLATOR | SUPELO - Species-level plant-protection codes used in pest and biocidal-product records: German, American, Oriental, and brown-banded cockroaches respectively.
- Catalogue of Life / GBIF scientific name - Blattodea (order); species binomial as in Periplaneta americana - No single ISO product code for the vernacular; registry rows for pests should key the species binomial, not the English word.
- Which of these identifiers and schemes hold for the sense of cockroach this model covers, and on what evidence? provenance
Standards and regulation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- US EPA under FIFRA (7 U.S.C. § 136 et seq.): registration of insecticidal products labelled for cockroach control, plus EPA indoor-IPM and school-IPM guidance.
- EU Biocidal Products Regulation (EU) No 528/2012: placing on the market of insecticide biocides used against cockroaches (Product Type 18).
- CEN EN 16636:2015 Pest management services - Requirements and competences: service standard used by professional cockroach control in Europe.
- US FDA Food Code (current edition, pest-control provisions for food establishments): exclusion, harbourage reduction, and prohibition of pests on premises.
- WHO Regional Office for Europe, Public health significance of urban pests (2008): public-health framing of cockroaches as contaminant and allergen, not as a named ISO product standard.
- Which of these standards and regulation hold for the sense of cockroach this model covers, and on what evidence? provenance
Real-world use
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Encountered as a structural and food-industry pest in kitchens, restaurants, hospitals, ships, and heated dwellings, where German cockroach colonies occupy voids, appliances, and drains.
- Used as feeder insects in herpetoculture (especially Blaptica dubia and nymphs of other blaberids) and as classroom or pet stock (Madagascar hissing cockroach).
- Used as a laboratory animal in insect neurophysiology, locomotion, and insecticide-toxicology work, historically Periplaneta americana.
- Farmed at industrial scale in parts of East Asia, principally Periplaneta americana, for traditional-medicine extracts and animal-feed biomass.
- Treated as a sanitary indicator in housing inspection and food-hygiene enforcement rather than as a commodity in most jurisdictions.
- Which of these real-world use hold for the sense of cockroach this model covers, and on what evidence? provenance
Typical measurements
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Adult body length (German cockroach) - 12-16 - mm
- Adult body length (American cockroach) - 35-50 - mm
- Eggs per ootheca (German vs American) - 30-40 (German); 12-16 (American) - eggs/ootheca
- Egg-to-adult development at indoor temperatures (German cockroach) - about 50-90 at 25-30 °C; much longer when cooler - d
- Preferred activity temperature of synanthropic species - 20-32 - °C
- Indoor allergen load in settled dust (Bla g 1, German cockroach) - sensitization and asthma-risk thresholds commonly cited near 2-8 - U/g dust
- Which of these typical measurements hold for the sense of cockroach this model covers, and on what evidence? provenance
Failure modes and hazards
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Mechanical contamination of food and surfaces with feces, regurgitant, and cuticle, carrying enteric bacteria such as Salmonella and E. coli without being a classical biological vector of a named human disease.
- Inhalant allergens (notably Bla g 1, Bla g 2, Per a 1) that sensitize occupants and exacerbate asthma, especially in poorly maintained urban housing.
- Insecticide resistance in German cockroach populations (target-site, metabolic, and behavioral), which causes bait and spray programmes to fail and selects for harder-to-control strains.
- Infestation of medical devices, electrical equipment, and food-processing plant, creating hygiene failures and occasional short-circuit or contamination incidents (brown-banded and American cockroaches in equipment voids).
- Psychological distress, housing stigma, and failed pest-control contracts when sanitation and harbourage are not addressed with the chemical treatment.
- Which of these failure modes and hazards hold for the sense of cockroach this model covers, and on what evidence? provenance
Regional variation
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- In the southeastern United States, 'palmetto bug' is ordinary speech for large Periplaneta (often American or smokybrown), not a separate taxon.
- In British usage, Oriental cockroach has long been called 'black beetle' in domestic pest control, which is not a beetle.
- German cockroach dominates heated indoor habitats globally; Oriental cockroach is more characteristic of cooler cellars and service ducts in temperate Europe.
- Asian cockroach (Blattella asahinai) is a field and garden flyer around the US Gulf Coast and is routinely misidentified as German cockroach when it comes to lights.
- Australia treats Periplaneta australasiae as a common peridomestic species; the same English name 'Australian cockroach' is a species name, not a national inventory of all cockroaches there.
- Mainland China is a centre of commercial Periplaneta americana farming for medicine and feed, a use almost absent from European and North American practice.
- Which of these regional variation hold for the sense of cockroach this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- Termites (Isoptera, nested in Blattodea) - Eusocial castes, typically pale workers, cellulose diet with gut or fungal farming, and alate swarmers with equal wings; non-termite cockroaches are not colony-caste insects and have a broad pronotal shield over the head.
- Beetles (Coleoptera), especially darkling and some ground beetles - Forewings are hard elytra meeting in a straight midline and development is holometabolous; cockroach tegmina overlap and nymphs resemble small wingless adults.
- Crickets and other Orthoptera - Saltatorial hind legs, usually stridulation, and a different pronotum; cockroaches run rather than jump and do not sing.
- Earwigs (Dermaptera) - Short tegmina and forceps-like cerci; cockroach cerci are segmented sensory appendages, not pincers.
- Asian cockroach (Blattella asahinai) versus German cockroach - Asian adults fly readily to lights and breed outdoors; German cockroach is a poor flyer that establishes persistent indoor kitchen colonies. Confirm with habitat plus hind-wing and pronotal markings, not colour alone.
- Native wood cockroaches (e.g. Parcoblatta) versus German cockroach - Wood cockroaches appear indoors as stray adults (often males at lights) and do not produce the dense kitchen infestations, fecal spotting, and mixed-instar aggregations of B. germanica.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of cockroach this model covers, and on what evidence? provenance
Sources
- Cockroaches: Ecology, Behavior, and Natural History - Morphology, life history, and the distinction between free-living Blattodea and the few synanthropic pest species; publisher Johns Hopkins University Press.
- Death of an order: a comprehensive molecular phylogenetic study confirms that termites are eusocial cockroaches - Placement of cockroaches and termites together in Blattodea and why vernacular 'cockroach' is the non-termite remainder of that order; publisher The Royal Society, Biology Letters.
- Public health significance of urban pests - Cockroaches as mechanical contaminant of food and as indoor allergen sources in dwellings and food premises; publisher WHO Regional Office for Europe.
- Cockroach - Current ordinal placement, widely used English names of pest species, and the Wikidata sitelink used as a catalogue identifier; publisher Wikimedia Foundation.
- NCBI Taxonomy Browser: Blattodea - NCBI taxon identifier for the order that contains cockroaches and termites; publisher National Center for Biotechnology Information.
What the second pass must settle
- Does this registry use cockroach in its ordinary sense excluding termites, and which neighbouring entry owns termites?
- Which identification references reliably distinguish local species and their nymphs from common look-alikes?
- Should a detached egg case be a separate registered thing linked to the individual, or an associated reproductive observation?
- Which species-specific evidence is required to distinguish incidental indoor visitors from cockroaches capable of establishing in the encountered premises?
- Which verified husbandry, ecological and jurisdictional guidance should govern containment, relocation and control in the intended deployment region?