imago
Enable an AI agent to recognise an insect in its imago stage, assess its adult condition and reproductive status, and choose appropriate observation, care or handling 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 an insect in its imago stage, assess its adult condition and reproductive status, and choose appropriate observation, care or handling actions.
The imago is the terminal, sexually mature instar of an insect, reached after the last ecdysis of the immature stages (the last nymph in ametabolous and hemimetabolous taxa, or emergence from the pupa in Holometabola), and the only stage that bears functional wings when the species is winged.
It can be Assess imago-stage identity using taxon-specific characters and emergence evidence.; Observe post-emergence development while minimising disturbance to soft cuticle and expanding wings.; Assess movement and physical condition through proportionate observation.; Provide taxon-supported adult resources and environmental conditions when care is authorised.; Record mating or egg-laying activity while keeping fertility and offspring viability unresolved unless evidenced.; Select observation, containment, handling or release actions according to adult condition, identification and applicable constraints..
Distinguishing features
Use taxon-appropriate adult characters and developmental evidence to distinguish an imago from a larva, nymph or pupa; size alone is insufficient.
Do not use wings as a universal adult-stage test: adult wing presence and development depend on the taxon and adult form.
For a suspected mayfly, explicitly distinguish the winged subimago from the imago using appropriate identification evidence.
Distinguish adult-stage identity from reproductive maturity: an individual can be an imago without being ready to reproduce.
Distinguish a newly emerged, soft-bodied adult from an immature life stage, and an empty emergence covering from the insect itself.
Scope
+ Evidence that an individual has reached the imago stage
+ Adult emergence history and subsequent cuticle and wing development
+ Adult morphology, functional capabilities and physical condition
+ Sex, reproductive maturity and observed reproductive activity
+ Adult resource needs, habitat use and constraints on handling
- Complete species descriptions and taxonomic classification systems
- Egg, larval, nymphal and pupal development except as evidence of adult emergence
- Population demography, colony organisation and ecosystem dynamics
- Psychological, cultural or other non-entomological meanings of imago
- Preserved specimen preparation and collection management beyond recording preservation status
Characteristics
- Taxonomic identification
- Best-supported taxon, identification confidence and diagnostic basis Adult-stage tests, expected morphology and suitable conditions depend on the taxon.
- Imago-stage determination
- Confirmed imago | probable imago | unresolved | identified as another stage Prevents adult-specific conclusions and actions from being applied on weak evidence.
- Emergence history
- Observed or inferred emergence event, predecessor stage and associated exuvia Connects adult identity to developmental evidence without treating a discarded covering as the individual.
- Elapsed time since emergence
- Hours or days, with uncertainty; unknown when emergence was not observed Helps interpret transient softness, incomplete wing expansion and changes in adult activity.
- Post-emergence development
- Cuticle soft | hardening | hardened | unresolved; wings expanding | expanded | abnormal | absent | unresolved Separates normal early adult development from damage and identifies handling sensitivity.
- Adult wing form
- Taxon-appropriate wing form, including fully winged, reduced-winged, wingless or unresolved Supports recognition without assuming that every imago can fly.
- Observed locomotor capability
- Walking, flight or other relevant movement: observed functional | apparently impaired | not tested | not applicable Distinguishes demonstrated capability from capability inferred from appearance.
- Vital and physical condition
- Alive | dead | unresolved, with observed injuries, missing structures and behavioural signs Determines whether care, further observation or specimen-oriented handling is appropriate.
- Sex and adult reproductive form
- Taxon-supported sex and, where applicable, caste or reproductive form; unresolved allowed Prevents reproductive expectations from being assigned to an incompatible or unidentified adult form.
- Reproductive maturity
- Supported mature | supported immature | unresolved, with evidence Adult identity alone does not establish mating readiness or fertility.
- Adult feeding mode
- Taxon-supported adult feeding mode, including non-feeding where established; unresolved allowed Avoids transferring juvenile diets to adults or offering unsuitable resources.
- Current resource and substrate association
- Observed association with food, water, resting substrate, mate or egg-laying substrate Grounds habitat and care decisions in the adult's actual activity and needs.
Also called
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.imago
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 17 findings · 29 questions.
Imago recognition Establish whether the individual belongs to the adult insect stage intended by this entry.
All subsequent assessments depend on separating adult identity from superficial resemblance, size and wing presence.
Taxonomic adult evidence
Connect the proposed identification to diagnostic adult characters.
Adult-stage determination
Record the characters supporting imago identity, their taxonomic applicability and remaining ambiguity.
- Which characters distinguish the imago from immature stages in the best-supported taxon? definition
- Which observations or identification references support those characters in this individual? provenance
Confusable stages and remains
Test alternatives that can produce a false adult identification.
Alternative-stage exclusion
Record how nymphal, pupal, subimaginal or empty-covering interpretations were assessed where relevant.
- Could this be a nymph, pupa, mayfly subimago or empty exuvia, and what evidence resolves that possibility? boundary
- If wings are absent or reduced, what independent evidence supports adult identity? boundary
Adult emergence Track the transition into the imago stage and the individual's immediate post-emergence development.
Newly emerged adults can have temporary characteristics and vulnerabilities that should not be mistaken for immaturity or permanent impairment.
Emergence event
Establish developmental continuity and the timing of adult emergence.
Emergence timing and origin
Record whether emergence was observed, its timing and any reliably associated predecessor stage or covering.
- Was entry into the imago stage directly observed, inferred from an associated covering or estimated from appearance? provenance
- What interval since emergence is supported, and how uncertain is it? measurement
Post-emergence development
Assess cuticle hardening and, where applicable, wing expansion.
Teneral condition
Record signs of a newly emerged adult and distinguish expected development from suspected abnormalities.
- What evidence indicates the current cuticle condition and wing-expansion state? measurement
- Which observations or taxon-specific expectations distinguish ongoing development from failed expansion or injury? boundary
- What support, space and reduced disturbance are appropriate during this stage? action
Adult function and condition Assess the adult body and its demonstrated ability to perform relevant activities.
Adult form does not by itself establish flight, feeding or survival capability.
Adult form and movement
Interpret wings and locomotion against the expected adult form.
Locomotor capability
Record expected locomotor structures separately from observed use and suspected impairment.
- What wing form and locomotor structures are expected for this taxon, sex or adult form? definition
- Which movements have been observed, under what conditions, and with what apparent limitations? measurement
Adult integrity and vitality
Assess survival status, structural damage and abnormal behaviour.
Condition assessment
Record observable signs without assigning an unsupported cause to inactivity or damage.
- What observations support the vital-status assessment and identify damaged or missing adult structures? measurement
- Could inactivity reflect normal rest or environmental conditions, and what further observation would distinguish these from impairment? boundary
Adult reproduction Distinguish reproductive identity, maturity and observed activity.
Being an imago does not establish reproductive role, mating history, fertility or successful reproduction.
Sex, form and maturity
Establish which reproductive assessments apply to the individual.
Reproductive status evidence
Record supported sex, relevant caste or adult form, and evidence of reproductive maturity.
- Which diagnostic observations support the assigned sex and any relevant caste or reproductive form? provenance
- What evidence supports reproductive maturity independently of imago-stage identity? boundary
Reproductive events
Record reproductive behaviour and its evidenced outcomes.
Mating and egg laying
Connect observed courtship, mating or egg laying to participants and substrates without assuming fertilisation or viability.
- Which reproductive events were observed, with which individuals or substrates? provenance
- Which outcomes are demonstrated, and which claims about mating success, fertilisation or viable offspring remain unsupported? boundary
Adult resources and intervention Connect adult-specific ecological needs and current condition to feasible actions.
Juvenile resource requirements may not apply to the imago, and suitable interventions depend on adult form and emergence state.
Adult resource use
Identify supported adult feeding, resting and reproductive substrate requirements.
Resource requirements
Separate observed resource use from taxon-based expectations and unresolved needs.
- Does this adult form feed, and what evidence supports its food and water requirements? provenance
- Which substrates are used for resting, emergence completion or egg laying, and which uses are directly observed? measurement
Condition-dependent actions
Choose proportionate actions using identification, adult condition and resource requirements.
Handling, care and release
Record the evidence and constraints supporting a proposed action involving the adult.
- How do cuticle condition, wing development, movement and injury constrain capture, transfer or examination? action
- What adult-specific resources and environmental conditions are supported for any proposed temporary care? action
- What identification, origin, site-suitability and authorisation evidence is needed before release or relocation? action
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.
- Holometabolous imago (adult after eclosion from the pupa)
- Hemimetabolous imago (adult after the last nymphal ecdysis)
- Ametabolous imago (adult of primitively wingless insects with no marked metamorphosis)
- Mayfly imago (sexually mature winged stage after the subimaginal molt in Ephemeroptera)
- Teneral imago (newly emerged adult whose cuticle is still soft and not fully coloured)
- Apterous imago (sexually mature adult of a primitively or secondarily wingless form)
- Non-feeding imago (adult with reduced or non-functional mouthparts, living only to disperse and reproduce)
- Which of these kinds and varieties hold for the sense of imago 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 - Q207254 - Item for the insect developmental stage, not a taxon.
- Wikidata property P4774 (biological phase) - imago (Q207254) - Used as a qualifier on images and statements to mark that the depicted organism is an imago.
- Scientific Latin - imago (plural imagines; also imagoes) - Technical name of the stage; entomologists generally prefer the Latin plural imagines.
- Which of these identifiers and schemes hold for the sense of imago 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.
- Species identification, type specimens and pinned museum series are almost always of the imago, because diagnostic genitalia, wing venation and colour pattern are imaginal characters.
- Light traps, Malaise traps and pheromone traps used in pest monitoring and faunistics sample flying imagines, not larvae.
- Anglers' dry-fly patterns treat the mayfly imago as the 'spinner' and the subimago as the 'dun'.
- What the public calls a butterfly, moth, beetle or bee is the imago; pollination, blood-feeding and locust swarms are imaginal activities.
- Biological-control releases and mating-disruption programmes act on the adult (imaginal) population.
- Which of these real-world use hold for the sense of imago 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.
- Imaginal lifespan of many summer butterflies - 14-28 - days
- Imaginal lifespan of short-lived non-feeding moths - 2-5 - days
- Duration of the mayfly subimago before the imaginal molt - minutes to <24 - hours
- Further molts after the insect is an imago - 0 (1 extra winged molt only from mayfly subimago to imago) - count
- Which of these typical measurements hold for the sense of imago 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.
- Failed or incomplete eclosion from the pupa or last nymphal skin, leaving crumpled, non-expanding wings.
- Teneral vulnerability: the newly emerged imago has a soft, unhardened cuticle and is easily damaged or predated before it can fly.
- Non-feeding imagines that fail to mate and oviposit within a short window leave no offspring.
- Imagines are the stage that bites, stings, vectors pathogens (mosquitoes, tsetse), or forms agricultural swarms (locusts).
- Mass mayfly emergences can coat roads and water-treatment screens; moth scales can be allergenic.
- Which of these failure modes and hazards hold for the sense of imago 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.
- English applied entomology, especially in North America, usually says 'adult'; 'imago' is more common in formal, European and taxonomic writing.
- Entomologists prefer the Latin plural imagines; English imagoes is accepted but less used.
- Anglophone fly-fishing names the imago 'spinner' and the subimago 'dun'.
- French treats imago as feminine and sometimes extends the term beyond insects (e.g. amphibian adults).
- Polish also calls it owad doskonały ('perfect insect'); Chinese uses 成虫 (chéngchóng).
- Which of these regional variation hold for the sense of imago 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.
- subimago - A winged but not yet sexually mature mayfly that still has one molt to go; wings are typically dull or hairy, not the clear 'spinner' wings of the imago.
- pupa (including chrysalis and puparium) - A non-feeding, usually immobile holometabolous stage that precedes the imago; no functional wings or reproductive activity.
- nymph - Immature hemimetabolous instar with wing pads and incomplete genitalia; the imago is the instar after the last nymphal ecdysis.
- larva - Holometabolous immature, typically without external wing buds or compound eyes; becomes an imago only after pupation and eclosion.
- imaginal disc - A cluster of larval cells that will build adult structures; it is tissue inside the immature, not the adult organism.
- adult (general zoology) - In entomology the two names pick out the same stage; 'adult' is the vernacular used across Animalia, 'imago' is the entomological stage term.
- psychoanalytic imago - An internalized mental image of a person, not a developmental stage of an organism; the test is domain (psychology versus entomology).
- Which of these neighbouring kinds and how to tell them apart hold for the sense of imago this model covers, and on what evidence? provenance
Sources
- Imago - Core definition as the last metamorphic stage; contrast of ametabolous/hemimetabolous versus holometabolous routes to the imago; sexual maturity and functional wings; mayfly subimago exception; entomological plural imagines.
- Imago - Entomologists' glossary - Working entomological usage: adult reproductive stage; wings almost always confined to the imago except the mayfly subimago; teneral eclosion (soft, translucent cuticle) as a distinct post-emergence state.
- imago - North American field usage including the older name 'perfect stage'; restriction of functional wings to the imago; explicit contrast with egg, larva, pupa and subimago.
- imago (Q207254) - Stable identifier for the developmental stage; English description 'last stage in an insect's metamorphosis'; use of imago as a Wikidata biological-phase (P4774) value on taxon images.
What the second pass must settle
- Does the registry intend imago specifically as the adult insect life stage, and should it be represented as a stage of an insect individual rather than an independently identified thing?
- Which existing Vercy insect or life-stage models already own this concept or parts of it, and where should this model link rather than duplicate?
- Which authoritative taxon-specific references should govern adult recognition, especially for mayfly subimagos, wingless adults and strongly modified adult forms?
- Which taxa and use cases require explicit treatment of caste, reproductive polymorphism or adults that do not feed?
- What taxon-specific evidence and observation methods can support post-emergence condition, reproductive maturity and care decisions without unsupported universal thresholds?