Ursus maritimus
Enable an AI agent to recognise Ursus maritimus, interpret evidence about its individuals and populations, and support habitat protection, monitoring and authorised management.
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.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an AI agent to recognise Ursus maritimus, interpret evidence about its individuals and populations, and support habitat protection, monitoring and authorised management.
Ursus maritimus Phipps, 1774, the polar bear, is a species of large carnivorous mammal in the family Ursidae, native to the circumpolar Arctic and adapted to hunting seals on sea ice.
It can be Evaluate a sighting or specimen identification and retain unresolved brown-bear or hybrid alternatives.; Associate individual observations with dated population boundaries without assuming permanent membership.; Compare body condition, reproduction and abundance only across compatible methods and demographic groups.; Identify seasonal feeding access and maternity habitat that require closer monitoring or protection review.; Route encounters, injured bears and suspected den disturbance to the relevant wildlife authority.; Determine which jurisdictional permissions and evidence must be checked before proposed monitoring or intervention..
Distinguishing features
Assess the combination of elongated neck, relatively small rounded ears, head profile and broad paws against brown-bear alternatives; pale fur alone is insufficient.
Check whether a wild occurrence is consistent with Arctic distribution; an Antarctic location demands correction or evidence of captivity or transport.
Use sea-ice-associated seal hunting as ecological support for identification, without excluding bears observed ashore or eating other foods.
Flag suspected polar bear-brown bear hybrids for expert assessment and appropriate genetic evidence rather than forcing identification from coat colour.
Separate an assertion about the species from a sighting of one bear or an estimate for a geographically bounded population.
Scope
+ Taxonomic identity, authority, external identifiers and identification uncertainty
+ Individual life stage, sex, reproductive state and body condition
+ Arctic distribution, seasonal movement, sea-ice access and maternity habitat
+ Feeding opportunities, fasting exposure and relationships with prey
+ Population evidence, conservation assessments and human interactions
- General bear biology owned by broader Ursidae or Ursus models
- Brown bears and hybrid taxa as independent taxonomic subjects
- Sea-ice physics and climate simulation methods
- Seal species biology beyond polar bear prey relationships
- Meat, hides, trophies and other derived products
- Veterinary treatment protocols and wildlife legislation as independent bodies of knowledge
Characteristics
- Taxonomic identity
- Ursus maritimus Phipps, 1774; species; genus Ursus; family Ursidae Anchors recognition to a taxonomic concept rather than the common name alone; reconcile provider-specific authority differences. [GBIF taxon record](https://www.gbif.org/taxon/7F2J9)
- External taxonomy linkage
- NCBI Taxonomy: 29073; GBIF accepted identifier and checklist version require reconciliation Connects genetic and occurrence evidence without silently equating conflicting records. [NCBI Taxonomy](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?id=29073&lvl=0)
- Biological subject level
- Species; population; management unit; individual; observation Prevents global conservation status from being interpreted as the health or trajectory of every bear.
- Sex and life stage
- Sex: female, male, undetermined; stage: dependent cub, independent immature, adult, undetermined Supports interpretation of sexual size dimorphism, dependency and reproductive potential without assigning sex from size alone.
- Body mass and condition
- Mass in kg; body-condition score with named protocol; date, sex, life stage and uncertainty Makes seasonal and demographic comparisons interpretable and distinguishes measured mass from visual estimates.
- Reproductive and denning state
- Pregnancy suspected or confirmed; maternity denning; accompanying dependent cubs; other; unknown Identifies sensitive maternal situations while keeping pregnancy and den occupancy separate from inference.
- Native range and occurrence context
- Circumpolar Arctic, including Canada, Greenland, Norway, Russia and the United States; dated location and wild or captive context Supports geographic plausibility checks and local assessment. [USFWS species account](https://www.fws.gov/species/polar-bear-ursus-maritimus)
- Seasonal sea-ice access
- Accessible ice days per season; distance to suitable ice in km; habitat definition and observation interval Connects local habitat conditions with opportunities to reach marine prey.
- Population abundance and trend
- Estimated individuals with uncertainty interval; trend over a stated period; geographic boundary and method Prevents incompatible surveys, changing boundaries or sparse observations from producing misleading comparisons.
- Dated global conservation assessment
- Verified baseline: IUCN Vulnerable, assessment year 2015; retain assessment source and check for supersession Records a dated species-level assessment independently of local trends and legal designations. [IUCN Polar Bear Specialist Group](https://www.iucn-pbsg.org/iucn-redlist/)
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 7 bundles · 13 layers · 20 findings · 32 questions.
Polar bear identity Establish the taxon and evaluate whether evidence belongs to it.
Common names, pale bears and hybrid ancestry can produce incorrect species assignments.
Taxonomic anchor
Resolve the scientific name and provider records.
Accepted species concept
Record the accepted binomial, authority, placement and versioned external identifiers; retain unresolved provider discrepancies.
- Which taxonomic authority supports Ursus maritimus Phipps, 1774 and its placement within Ursidae? provenance
- Which accepted GBIF record corresponds to NCBI Taxonomy 29073, and which checklist version establishes that mapping? boundary
Field identification
Assess observations against other bears and possible hybrids.
Identification confidence
Combine diagnostic morphology, location and evidence quality without treating pale fur as decisive.
- Which visible head, neck, ear and paw features support polar bear identification over a pale brown bear? measurement
- What conflicting evidence would require expert or genetic review for possible hybrid ancestry? action
Life history and condition Interpret a bear's state through sex, development and maternal dependency.
Body size, condition and vulnerability depend on demographic and seasonal context.
Demographic condition
Separate life stage and sex from measurements of condition.
Contextual body assessment
Record sex, age evidence, dependency, mass and condition with methods suitable for comparison.
- How were sex, age class and independence from the mother established? provenance
- Does the condition comparison account for sexual size dimorphism, reproductive state and season? measurement
Maternal cycle
Track reproductive evidence, denning and dependent young.
Maternity and cub dependency
Represent maternity denning separately from general shelter use and record cub outcomes over time. [USFWS species account](https://www.fws.gov/species/polar-bear-ursus-maritimus)
- What evidence distinguishes an occupied maternity den from a suspected den or temporary shelter? boundary
- When were cub number, dependency and subsequent survival observed, and which outcomes remain unknown? measurement
Arctic habitat and movement Connect seasonal locations to usable ice, land and denning habitat.
A range polygon alone cannot describe changing access to feeding and maternity areas.
Seasonal ice access
Evaluate sea ice as accessible habitat rather than total regional ice cover.
Usable hunting habitat
Specify how local ice conditions, timing and movement determine access to hunting areas.
- Which ice conditions count as accessible hunting habitat for this location and season? definition
- How do breakup, freeze-up and distance to usable ice change the bear's access over the observation period? measurement
Land and denning areas
Interpret terrestrial occurrences within seasonal movement and reproduction.
Terrestrial use context
Distinguish seasonal land use, transit and denning from unsupported conclusions about displacement.
- Does the terrestrial occurrence represent seasonal residence, transit, denning or an unresolved use? boundary
- Which dated observations establish connections between this area, feeding habitat and maternity sites? provenance
Feeding and energy balance Assess food acquisition and periods without adequate feeding.
Food observations must be interpreted in terms of energy intake and access, not merely dietary variety.
Prey and feeding evidence
Distinguish prey availability, hunting and consumption.
Marine prey access
Prioritise evidence about access to ringed and bearded seals while allowing other observed foods. [USFWS species account](https://www.fws.gov/species/polar-bear-ursus-maritimus)
- Does the record show available prey, an attempted hunt, a kill or confirmed consumption? boundary
- Which prey and feeding observations support an estimate of intake rather than presence alone? measurement
Fasting and reserves
Relate feeding interruptions to condition without inventing universal thresholds.
Energetic stress evidence
Separate observed condition change from inferred fasting duration and modelled energy deficit.
- What evidence bounds the duration of limited feeding, and how does body condition change during it? measurement
- What evidence shows whether terrestrial food or scavenging materially offsets reduced seal access for this demographic group? provenance
Population and conservation Interpret abundance, demographic change and extinction-risk assessments at their proper scales.
Local observations, management units and global assessments answer different questions.
Population evidence
Attach estimates to explicit boundaries, periods and methods.
Comparable population estimates
Distinguish biological populations from administrative units and preserve uncertainty in estimated change.
- Which boundary version and movement evidence define the population or management unit being assessed? boundary
- Are abundance, survival and recruitment estimates comparable in survey method, coverage and observation period? measurement
Risk and threat attribution
Keep dated conservation classifications separate from causal evidence and forecasts.
Assessment scope and drivers
Use the verified 2015 Vulnerable assessment as a dated baseline; represent sea-ice-loss projections with their assumptions and uncertainty. [IUCN Polar Bear Specialist Group](https://www.iucn-pbsg.org/iucn-redlist/)
- Which assessment date, geographic scope and criteria support the reported conservation category? provenance
- Which local effects of ice loss, removals, contaminants or disturbance are measured, inferred or projected? boundary
Human interaction and management Support accountable decisions where people, infrastructure and polar bears interact.
Encounter response and wildlife intervention require local context, qualified authority and attention to dependent young.
Encounter context
Describe behaviour, attractants and maternal context before selecting a response.
Encounter triage
Record observable encounter conditions without equating proximity with aggression or assuming habituation.
- What behaviour, distance, food attractants and presence of cubs or a den were actually observed? measurement
- Which local response authority and current encounter protocol apply to this location? action
Authorised monitoring and intervention
Link proposed actions to their permissions, evidence and likely effects.
Action eligibility
Assess observation, sampling, tagging, deterrence or relocation separately, with jurisdiction, Indigenous rights and maternal risks explicitly considered.
- Which permissions, responsible organisations and applicable Indigenous governance arrangements govern the proposed action? action
- What evidence supports the action's benefit, and how will effects on the bear, dependent cubs and nearby people be evaluated? 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.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- This is recalled knowledge, not a researched assessment; verify exact GBIF and NCBI identifiers.
- Verify the current IUCN category and assessment year before adding conservation status.
- Body-mass ranges are approximate; verify population-specific measurements and current regional management rules.
- Which of these check these first hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- International Code of Zoological Nomenclature - Ursus maritimus Phipps, 1774 - Species name and taxonomic authority; identifies the taxon, not an individual or population.
- NCBI Taxonomy - Numeric Taxonomy ID - The species identifier should be verified before use.
- GBIF Backbone Taxonomy - Numeric taxon key - Verify the accepted species record and its key.
- Which of these identifiers and schemes hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- International Commission on Zoological Nomenclature: the International Code of Zoological Nomenclature governs zoological naming.
- Agreement on the Conservation of Polar Bears (1973): the five Arctic range states cooperate on conservation and regulate taking.
- CITES, administered by its Parties: polar bears are listed in Appendix II, regulating international trade in specimens and products.
- Which of these standards and regulation hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Research on sea-ice ecosystems, predator ecology and responses to environmental change.
- Monitoring body condition, reproduction and survival to assess population health.
- Subsistence and cultural practices of some Arctic Indigenous communities, subject to applicable management arrangements.
- Wildlife tourism and conservation education.
- Which of these real-world use hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Adult male body mass - Approximately 350-700; varies with season, age and population - kg
- Adult female body mass - Approximately 150-300 when not pregnant; pregnant females can be substantially heavier - kg
- Litter size - Usually 1-2 - cubs
- Which of these typical measurements hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Loss and fragmentation of sea ice can reduce access to seals and prolong fasting.
- Poor maternal body condition can impair reproduction and cub survival.
- Persistent contaminants can accumulate through the marine food web.
- Encounters near settlements and food attractants can cause human injury and lethal removal of bears.
- Disturbance of maternity dens can threaten females and dependent cubs.
- Which of these failure modes and hazards hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Native range spans Arctic regions of Canada, Greenland, Norway's Svalbard region, Russia and the United States through Alaska.
- Bears in seasonal-ice regions may spend extended periods ashore; movement and feeding opportunities differ where sea ice persists longer.
- Recognized management subpopulations differ in sea-ice conditions, prey availability and demographic trends; these are not separate species.
- Which of these regional variation hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Ursus arctos - The brown bear is a distinct, closely related species with broader terrestrial feeding adaptations; hybridization means reproductive compatibility alone does not separate them.
- Polar bear subpopulation - A geographically and demographically defined portion of Ursus maritimus, rather than the species as a whole.
- Individual polar bear - A single organism with its own age, sex and condition; species-level conservation assessments do not describe that individual's condition.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of Ursus maritimus this model covers, and on what evidence? provenance
What the second pass must settle
- Which accepted GBIF identifier and checklist release should be linked to the registry, given differing authority strings and records returned by providers?
- Has a published global IUCN assessment superseded the verified 2015 assessment, and which dated source establishes the latest status?
- Which current population boundaries and naming authority should the model use, and how should disputed or changing units be represented?
- Which validated, region-specific condition and fasting measures support management decisions across sexes, ages and reproductive states?
- What identification evidence is sufficient for suspected hybrids, and which local governance rules control intervention and access to sensitive den or community-held observations?