California least tern
E542172
The California least tern is a small, endangered seabird native to the Pacific coast of North America, known for nesting on sandy beaches and coastal dunes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| California least tern canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5727458 — 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: California least tern Context triple: [Guadalupe-Nipomo Dunes, habitatFor, California least tern]
-
A.
California gull
The California gull is a medium-sized North American gull species best known for its historic role in saving early Mormon settlers’ crops in Utah from a devastating insect infestation.
-
B.
piping plover
The piping plover is a small, sand-colored shorebird native to North America, known for nesting on sandy beaches and being listed as a threatened species due to habitat loss and human disturbance.
-
C.
Cape Sable seaside sparrow
The Cape Sable seaside sparrow is an endangered, non-migratory songbird found only in the freshwater marl prairies of southern Florida’s Everglades.
-
D.
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.
-
E.
Kentish plover
The Kentish plover is a small, pale shorebird of sandy coasts and salt flats, known for its quick, darting movements and widespread breeding across Eurasia and North Africa.
- 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: California least tern Target entity description: The California least tern is a small, endangered seabird native to the Pacific coast of North America, known for nesting on sandy beaches and coastal dunes.
-
A.
California gull
The California gull is a medium-sized North American gull species best known for its historic role in saving early Mormon settlers’ crops in Utah from a devastating insect infestation.
-
B.
piping plover
The piping plover is a small, sand-colored shorebird native to North America, known for nesting on sandy beaches and being listed as a threatened species due to habitat loss and human disturbance.
-
C.
Cape Sable seaside sparrow
The Cape Sable seaside sparrow is an endangered, non-migratory songbird found only in the freshwater marl prairies of southern Florida’s Everglades.
-
D.
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.
-
E.
Kentish plover
The Kentish plover is a small, pale shorebird of sandy coasts and salt flats, known for its quick, darting movements and widespread breeding across Eurasia and North Africa.
- F. None of above. chosen
Statements (54)
| Predicate | Object |
|---|---|
| instanceOf |
bird
ⓘ
migratory bird ⓘ subspecies ⓘ |
| billColor | yellow with black tip in breeding season ⓘ |
| bodyLength | about 22–24 cm ⓘ |
| breedingSystem | colonial nester ⓘ |
| breedsIn |
Baja California
NERFINISHED
ⓘ
California NERFINISHED ⓘ |
| class | Aves NERFINISHED ⓘ |
| conservationStatus | endangered ⓘ |
| conservationStatusSystem | U.S. Endangered Species Act NERFINISHED ⓘ |
| diet |
marine invertebrates
ⓘ
small fish ⓘ |
| eggColor | speckled ⓘ |
| family | Laridae NERFINISHED ⓘ |
| foragingHabitat | nearshore waters ⓘ |
| foragingStrategy | plunge-diving ⓘ |
| genus | Sternula NERFINISHED ⓘ |
| habitat |
coastal dunes
ⓘ
coastal lagoons ⓘ estuaries ⓘ sandy beaches ⓘ |
| incubation | both parents incubate eggs ⓘ |
| kingdom | Animalia ⓘ |
| legColor | yellow ⓘ |
| mass | about 40–50 g ⓘ |
| migration | long-distance migrant ⓘ |
| nativeTo |
Baja California
NERFINISHED
ⓘ
California NERFINISHED ⓘ Pacific coast of North America NERFINISHED ⓘ |
| nestingSite |
open sandy beaches
ⓘ
sparsely vegetated coastal dunes ⓘ |
| nestType | shallow scrape in sand ⓘ |
| order | Charadriiformes NERFINISHED ⓘ |
| parentalCare | both parents feed chicks ⓘ |
| parentTaxon |
Sternula antillarum
NERFINISHED
ⓘ
least tern NERFINISHED ⓘ |
| phylum | Chordata ⓘ |
| plumage |
black cap in breeding season
ⓘ
gray upperparts ⓘ white underparts ⓘ |
| protectedBy |
California Endangered Species Act
NERFINISHED
ⓘ
U.S. Endangered Species Act NERFINISHED ⓘ |
| reproduction | lays 1–3 eggs per clutch ⓘ |
| socialBehavior | forms breeding colonies on beaches ⓘ |
| taxonRank | subspecies ⓘ |
| threat |
coastal development
ⓘ
habitat loss ⓘ human disturbance ⓘ predation by birds ⓘ predation by mammals ⓘ recreational beach use ⓘ |
| wingspan | about 50 cm ⓘ |
| wintersIn | Pacific coast of Central America ⓘ |
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: California least tern Description of subject: The California least tern is a small, endangered seabird native to the Pacific coast of North America, known for nesting on sandy beaches and coastal dunes.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Guadalupe-Nipomo Dunes