bearded vulture
Enable an AI agent to recognise a bearded vulture, assess its condition and ecological dependencies, and determine which observation, conservation or care actions are justified.
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 bearded vulture, assess its condition and ecological dependencies, and determine which observation, conservation or care actions are justified.
A large mountain-dwelling Old World accipitrid (Gypaetus barbatus) unique among extant birds in taking most of its energy from large-mammal bone, which it fractures at traditional drop sites (ossuaries) and dissolves with an exceptionally acidic stomach; adults often stain cream underparts rust-orange by bathing in iron-oxide soils.
It can be Assess a sighting against age-appropriate identification evidence and retain unresolved alternatives.; Match observations to a known bird using documented identifiers and confidence.; Evaluate whether a bird can obtain and process food independently.; Relate movements and nesting behaviour to resource use and potential disturbance.; Flag evidence requiring specialist assessment and establish prerequisites for handling, feeding, tagging or release.; Compare observations before and after an intervention to assess feeding, flight and survival outcomes..
Distinguishing features
In a sufficiently clear adult view, test for black facial markings and bill-base beard bristles together with a feathered head and neck; this combination helps separate it from griffon and cinereous vultures. [Animal Diversity Web](https://animaldiversity.org/accounts/Gypaetus_barbatus/)
For dark immature birds potentially confused with other large raptors, assess the head, neck and less conspicuous beard together; absence of adult pale plumage does not exclude bearded vulture. [Animal Diversity Web](https://animaldiversity.org/accounts/Gypaetus_barbatus/)
Repeated bone consumption and carrying bones to drop onto rock strongly support identification as a bone specialist; merely attending a carcass does not. [Vulture Conservation Foundation](https://4vultures.org/vultures/bearded-vulture/)
Treat rusty underparts as supporting evidence, not a required test: iron-rich bathing can stain otherwise pale feathers. Confirm facial features rather than rejecting a pale bird. [Vulture Conservation Foundation](https://4vultures.org/vultures/bearded-vulture/)
Scope
+ Species recognition across immature and adult appearances, with explicit identification uncertainty
+ Individual identity, age evidence, origin and wild or managed status
+ Bone acquisition, processing, feeding independence and nutritional condition
+ Use of mountain foraging areas, bone-breaking sites, roosts and nesting cliffs
+ Breeding participation, parental provisioning and dependent-young outcomes
+ Individual threats, intervention prerequisites and subsequent outcomes
- Complete models of other vultures, eagles or scavenger communities
- Carcass, livestock and wild ungulate models beyond their relationship to the bird
- Mountain ecosystem, cliff and protected-area management models
- Population census, demographic forecasting and species-wide conservation assessments
- Veterinary treatment protocols and toxicological reference standards
- Conservation organisation, permit and reintroduction programme administration
Characteristics
- Recognition evidence
- confirmed, probable, unresolved, rejected; supporting images, diagnostic features and alternative identifications Prevents uncertain large-raptor sightings from becoming established bearded-vulture records.
- Age and developmental stage
- nestling, fledgling, immature, adult, unknown; age interval in years with evidence Changes how appearance, feeding independence and breeding behaviour should be interpreted.
- Individual identity and origin
- Links to verified ring, marking, transmitter, pedigree, hatch or release records; unresolved identity allowed Connects repeated sightings without conflating birds or inferring origin from location.
- Plumage staining
- unstained-looking, rusty-stained, mixed, indeterminate; observation date and lighting Separates visible colour variation from unsupported age or health conclusions.
- Food acquisition and processing
- provisioned, scavenging independently, carrying bones, dropping bones, ingesting fragments, unsuccessful, unknown Distinguishes access to remains from demonstrated ability to obtain food.
- Body mass trend
- kg and change over dated measurements, with method and developmental context Supports condition assessment when legitimate handling or existing care records provide measurements.
- Flight and feeding function
- observed functional, suspected impairment, confirmed impairment, not assessed; separate flight, landing and ingestion observations Makes intervention depend on demonstrated function and evidence.
- Site relationship
- foraging area, bone-breaking site, roost, bathing site, nesting site, transit location; dated evidence Connects the bird to resources without treating every sighting as territory occupancy.
- Breeding role and stage
- unresolved, nonbreeding, courtship, nest attendance, incubation, chick provisioning, post-fledging care, failed attempt Identifies dependent young and the consequences of disturbing or removing an adult.
- Exposure evidence
- suspected, observed, analytically confirmed, excluded, unknown; linked hazard and dated evidence Keeps potential poisoning, collision or disturbance separate from diagnosed harm.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 5 bundles · 9 layers · 16 findings · 26 questions.
Recognition and life history Establish what bird was observed and which aspects of its history are evidenced.
Age-related appearance and managed releases make species recognition, individual identity and origin separate judgements.
Age-aware identification
Evaluate the visible evidence without requiring adult features in immature birds.
Diagnostic feature combination
Record facial markings, beard visibility, head feathering and overall plumage, with observation quality and competing identifications.
- Which visible features support bearded vulture, and which plausible local raptors remain unexcluded? definition
- Are apparent missing features explained by age, viewing angle or image quality? boundary
Individual continuity
Connect sightings to evidenced age, identity and origin.
Identity without assumed origin
Keep a visual identity match distinct from verified hatch, captive-breeding and release history.
- Which ring, marking, transmitter or documented feature connects this observation to a known bird? provenance
- What record supports its age and wild-born or captive-bred origin, and how uncertain is the match? provenance
Bone feeding and condition Represent access to usable food, processing behaviour and evidence of nutritional function.
Carcass availability alone cannot establish that a bone-specialist bird is feeding successfully.
Food access and selection
Distinguish available remains from food actually selected and consumed.
Usable food evidence
Record bone and soft-tissue use, food origin, accessibility and provisioning status without imposing a universal dietary percentage.
- What bone or soft tissue did this bird actually consume, rather than merely approach or carry? measurement
- What is known about the remains' origin, potential contamination and suitability for this bird's developmental stage? provenance
Processing and functional condition
Evaluate whether observed food handling leads to ingestion and sustained function.
Bone-processing success
Separate carrying, dropping, fragment retrieval and ingestion; retain observation effort so unseen feeding is not classified as failure.
- Across observed attempts, did bone handling or dropping lead to retrieved and swallowed fragments? measurement
- Do repeated failures, declining measured condition or impaired flight justify specialist assessment, given the bird's age and observation coverage? action
Mountain space and breeding Connect resource use, breeding associations and reproductive outcomes.
Foraging locations and nesting commitments have different implications for protection and intervention.
Functional site use
Assign site roles from behaviour and repeated observations.
Site role and occupancy
Distinguish passage from repeated use of foraging, bone-breaking, bathing, roosting or nesting locations.
- Which observed behaviour establishes this location's role for this bird? definition
- What repeated observations distinguish sustained use from a brief visit, and what spatial uncertainty remains? measurement
Breeding group and dependants
Record participants, nesting stage and dependent-young outcomes without assuming every breeding group is a pair.
Reproductive commitment
Allow pairs or trios and record eggs, hatchlings and fledglings separately. [Vulture Conservation Foundation](https://4vultures.org/vultures/bearded-vulture/)
- Which identified birds demonstrably incubate, provision or defend this nesting attempt? provenance
- What dated evidence establishes the current stage and survival of each dependent young bird? measurement
- How would approaching the nest or removing a participating adult affect the current dependants? action
Threats and conservation actions Connect evidence of harm to justified actions and measurable outcomes.
A distressed bird, an unobserved bird and a failed transmitter require different responses, particularly when breeding or release histories are involved.
Exposure and harm
Assess hazards through the bird's actual feeding, movement and nesting relationships.
Hazard-to-outcome evidence
Link suspected contaminated remains, infrastructure encounters or nest disturbance to observed effects while retaining alternative explanations.
- What evidence connects this bird to a specific suspect food source, collision event or disturbance episode? provenance
- Does the evidence establish exposure, functional harm or mortality, or only loss of observation or telemetry? boundary
Intervention and follow-up
Make action eligibility and subsequent outcomes explicit for this bird.
Justified intervention
Record the objective, specialist decision, applicable authority and follow-up evidence for supplementary feeding, rescue, tagging or release.
- Which action is supported by this bird's feeding competence, flight function, breeding obligations and applicable permissions? action
- Who is responsible for the decision and execution, and which documented protocol applies? provenance
- Which subsequent observations would demonstrate recovery, independent feeding or a need to revise the action? measurement
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.
- Gypaetus barbatus barbatus (nominate Eurasian and North African subspecies)
- Gypaetus barbatus meridionalis (Afrotropical subspecies of the Ethiopian highlands, East Africa and southern Africa)
- Himalayan/Central Asian birds, sometimes separated in older lists as G. b. hemachalanus or G. b. aureus but usually lumped in barbatus
- Field age-classes used in monitoring: juvenile (first-year dark plumage), immature/subadult (multi-year mottled transition), adult (pale head, dark beard and diamond tail)
- Conservation management units rather than taxa: remnant Pyrenean, Corsican and Cretan stocks versus the reintroduced Alpine metapopulation
- Captive-breeding and hacking stock used in European reintroduction programmes
- Which of these kinds and varieties hold for the sense of bearded vulture 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.
- ICZN binomial - Gypaetus barbatus (Linnaeus, 1758) - Type genus of the bone-eating vulture; family Accipitridae.
- Wikidata - Q172408 - Item for the species Bearded vulture / Gypaetus barbatus.
- IUCN / BirdLife species identifier - 22695219 - Shared Red List and Data Zone numeric id.
- CITES - Appendix II, listed as Gypaetus barbatus - Trade in specimens requires permits; not a zero-trade Appendix I listing.
- eBird / Clements species code - beavul - Six-letter code used in eBird checklists and Clements taxonomy exports.
- Which of these identifiers and schemes hold for the sense of bearded vulture 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.
- IUCN Red List: Gypaetus barbatus assessed as Near Threatened (BirdLife International as Red List authority).
- CITES Appendix II (CITES Secretariat / UNEP): international commercial trade regulated.
- Convention on the Conservation of Migratory Species of Wild Animals (CMS / Bonn Convention): listed; European populations treated as a high-priority migratory raptor.
- EU Birds Directive 2009/147/EC Annex I (European Union): strict protection and SPA network obligations.
- Bern Convention Appendix II (Council of Europe): strictly protected fauna in party states.
- National threatened-species catalogues (e.g. Spain's Catálogo Español de Especies Amenazadas; French and Swiss species protection laws) that ban killing, nest disturbance and unlicensed possession.
- EU animal-by-product hygiene rules (successors to Regulation (EC) No 1774/2002) that restrict leaving livestock carcasses in the field and thereby govern supplementary feeding sites (muladares).
- Which of these standards and regulation hold for the sense of bearded vulture 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.
- Wild mountain scavenger encountered by raptor watchers, shepherds and park staff at carcasses, ossuaries and cliff nests in the Pyrenees, Alps, Ethiopia, Drakensberg, Caucasus, Zagros and Himalaya.
- Flagship of European reintroduction: captive breeding, hacking and GPS-tagging run by the Vulture Conservation Foundation and Alpine range-state agencies.
- Indicator in raptor poisoning and lead-ammunition studies because bone and marrow concentrate contaminants.
- Subject of supplementary feeding and carcass-management programmes where sanitary law otherwise removes livestock remains.
- Occasionally held in zoological collections as a conservation-education and breeding species, not as a commodity bird.
- Historical folklore as a lamb-killer (the name lammergeier) is a misreading of its bone-feeding; that reputation drove past persecution.
- Which of these real-world use hold for the sense of bearded vulture 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.
- wingspan - 230-283 - cm
- body mass (females larger) - 4.5-7.8 - kg
- total length - 94-125 - cm
- adult diet as bone - 70-90 - % of ingested mass/energy
- age at first breeding - 5-8 - years
- clutch size - 1-2 - eggs
- IUCN generation length - about 14 - years
- typical bone-drop height at ossuaries - 20-150 - m
- Which of these typical measurements hold for the sense of bearded vulture 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.
- Lead poisoning from ammunition fragments in hunter-shot ungulate carcasses and viscera.
- Illegal poison baits set for wolves, foxes or dogs, still a leading cause of adult mortality in southern Europe.
- Veterinary NSAIDs (notably diclofenac) in livestock carcasses, a documented Gyps-vulture killer and a residual risk for this species where those drugs are used.
- Electrocution on poorly fitted pylons and collision with power lines and wind turbines in mountain passes.
- Nest failure from human disturbance at cliff sites (climbing, helicopters, photography).
- Food shortage where carcass hygiene rules and declines in extensive pastoralism remove the bone supply.
- Obligate cainism: the second chick is almost always killed, so productivity is one young per successful pair.
- Inbreeding and stochastic loss in tiny isolated remnants (Corsica, Crete, some African isolates).
- Direct shooting and trapping, now rarer but not extinct as a threat.
- Which of these failure modes and hazards hold for the sense of bearded vulture 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 and older Germanic usage still prefers lammergeier (from German Lämmergeier, 'lamb vulture'); Spanish uses quebrantahuesos ('bone-breaker'); French gypaète barbu; German Bartgeier; Italian gipeto.
- Two-subspecies split is the working taxonomic practice: barbatus across Europe, North Africa and Asia; meridionalis in sub-Saharan Africa, the latter often smaller and with a plainer head.
- European conservation is dominated by reintroduction, GPS tags and feeding sites; African and Himalayan practice is mostly protection of wild cliff-nesting pairs with far less captive management.
- Rust staining of adult plumage is widespread but not universal; it depends on local iron-rich dust baths, so 'orange' versus 'white' adults are environmental, not taxonomic.
- Legal carcass disposal is strictest in the EU, which is why vulture restaurants are a European management tool more than an African or Central Asian one.
- Which of these regional variation hold for the sense of bearded vulture 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.
- Griffon vulture (Gyps fulvus) - Griffons have a short square tail, broad slotted wings and a pale ruff; bearded vultures show a long diamond-shaped tail, pointed wings in a shallow V, and no ruff. In flight the silhouette is the reliable split.
- Egyptian vulture (Neophron percnopterus) - Egyptian vultures are much smaller, adults are white with black flight feathers and a bare yellow face; they lack the black eye-stripe 'beard' and do not specialise on dropping large bones.
- Golden eagle (Aquila chrysaetos) - Eagles have fully feathered tarsi, a shorter rounded tail and they kill live prey; bearded vultures have bare tarsi, a longer wedge/diamond tail, and are scavengers. Juveniles are the usual confusion; tail shape and flight style separate them.
- Cinereous (Eurasian black) vulture (Aegypius monachus) - A uniformly dark, massive soaring vulture with a short wedge tail and pale feet; never shows the bearded vulture's pale head, black bandit mask, or bone-dropping behaviour.
- Himalayan vulture (Gyps himalayensis) - A huge pale Gyps of the same mountains, with a short tail and ruff; bearded vultures are slimmer, long-tailed, and forage by searching slopes rather than circling in tight Gyps kettles.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of bearded vulture this model covers, and on what evidence? provenance
Sources
- Gypaetus barbatus (Bearded Vulture) - Global status (Near Threatened), range, generation length, and principal threats as assessed for the IUCN Red List.
- Raptors of the World - Morphology, subspecies treatment, measurements, identification against other mountain raptors, and natural-history baseline.
- CITES Appendices I, II and III - International trade listing of Gypaetus barbatus on Appendix II.
- Directive 2009/147/EC of the European Parliament and of the Council on the conservation of wild birds - EU legal protection and Annex I listing that drives Special Protection Areas and reintroduction policy.
- Bearded vultures (Gypaetus barbatus) prefer fatty bones - Osteophagous diet, bone selection, and the ecological role of ossuaries.
What the second pass must settle
- Which validated regional identification guides provide reliable immature-age criteria and distinctions from locally confusable eagles and vultures?
- Which age-specific food requirements and feeding-competence criteria should govern assessment of nestlings, fledglings and released juveniles?
- Which regional breeding calendars, nesting-stage indicators and disturbance thresholds should parameterise site-level decisions?
- Which validated condition measures and exposure tests distinguish normal inactivity or temporary feeding failure from cases requiring intervention?
- Which current local authorities, permissions and specialist protocols govern feeding, handling, tagging, release and access to sensitive nest locations?