black-bellied tern
E811942
The black-bellied tern is a medium-sized riverine tern of South Asia, now endangered due to habitat loss and declining river ecosystems.
All labels observed (1)
| Label | Occurrences |
|---|---|
| black-bellied tern canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T9652143 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: black-bellied tern Context triple: [National Chambal Sanctuary, protectsSpecies, black-bellied tern]
-
A.
Caspian tern
The Caspian tern is a large, powerful seabird and the world’s biggest tern species, known for its stout red bill and wide distribution across coastal and inland waters worldwide.
-
B.
Antarctic tern
The Antarctic tern is a small, migratory seabird of polar regions, known for its graceful flight, long-distance movements, and nesting on rocky Antarctic and sub-Antarctic coasts and islands.
-
C.
River Tern
The River Tern is a river in Shropshire, England, known as a tributary of the River Severn flowing through rural landscapes and historic market towns.
-
D.
Black-tailed gull
The Black-tailed gull is a medium-sized East Asian gull species known for its distinctive black-tipped tail and yellow bill with a red and black spot.
-
E.
least tern
The least tern is a small migratory seabird of North and Central America, known for its slender build, sharp black-and-white head pattern, and nesting on open sandy or gravelly riverbanks and coastal beaches.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: black-bellied tern Target entity description: The black-bellied tern is a medium-sized riverine tern of South Asia, now endangered due to habitat loss and declining river ecosystems.
-
A.
Caspian tern
The Caspian tern is a large, powerful seabird and the world’s biggest tern species, known for its stout red bill and wide distribution across coastal and inland waters worldwide.
-
B.
Antarctic tern
The Antarctic tern is a small, migratory seabird of polar regions, known for its graceful flight, long-distance movements, and nesting on rocky Antarctic and sub-Antarctic coasts and islands.
-
C.
River Tern
The River Tern is a river in Shropshire, England, known as a tributary of the River Severn flowing through rural landscapes and historic market towns.
-
D.
Black-tailed gull
The Black-tailed gull is a medium-sized East Asian gull species known for its distinctive black-tipped tail and yellow bill with a red and black spot.
-
E.
least tern
The least tern is a small migratory seabird of North and Central America, known for its slender build, sharp black-and-white head pattern, and nesting on open sandy or gravelly riverbanks and coastal beaches.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
animal
ⓘ
bird ⓘ tern ⓘ |
| activityPattern | diurnal ⓘ |
| bodySize | medium-sized tern ⓘ |
| breedingHabitat |
gravel bars in rivers
ⓘ
sandbanks in rivers ⓘ |
| class | Aves ⓘ |
| clutchSize | small clutch of eggs ⓘ |
| commonName | black-bellied tern ⓘ |
| conservationStatus | Endangered ⓘ |
| conservationStatusSystem |
IUCN Red List
ⓘ
linked to:
IUCN Red List of Threatened Species
|
| diet |
aquatic invertebrates
ⓘ
small fish ⓘ |
| distinguishingFeature |
black belly in breeding plumage
ⓘ
forked tail ⓘ long, pointed wings ⓘ slender body ⓘ |
| ecoregion |
Ganges-Brahmaputra river system
ⓘ
linked to:
Ganges-Brahmaputra-Meghna river system
Indus river system ⓘ
linked to:
Indus River basin
|
| family | Laridae ⓘ |
| foragingBehavior |
plunge-diving for fish
ⓘ
surface-dipping for prey ⓘ |
| genus | Sterna ⓘ |
| habitat |
large river systems
ⓘ
riverine sandbars ⓘ rivers ⓘ |
| kingdom | Animalia ⓘ |
| migration | partially migratory ⓘ |
| nativeTo |
Bangladesh
ⓘ
India ⓘ Nepal ⓘ Pakistan ⓘ South Asia ⓘ |
| nestType | scrape on bare sand ⓘ |
| order | Charadriiformes ⓘ |
| phylum | Chordata ⓘ |
| populationTrend | decreasing ⓘ |
| primaryCauseOfDecline | degradation of riverine habitats ⓘ |
| reproduction | lays eggs on open sandbars ⓘ |
| scientificName | Sterna acuticauda ⓘ |
| taxonRank | species ⓘ |
| threat |
declining river ecosystems
ⓘ
disturbance at nesting sites ⓘ habitat loss ⓘ river regulation ⓘ sand mining ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: black-bellied tern Description of subject: The black-bellied tern is a medium-sized riverine tern of South Asia, now endangered due to habitat loss and declining river ecosystems.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.