mountain beaver
E202450
The mountain beaver is a burrowing, primitive rodent native to the Pacific Northwest of North America, known for its dense fur, secretive lifestyle, and status as the sole living member of its family Aplodontiidae.
All labels observed (1)
| Label | Occurrences |
|---|---|
| mountain beaver canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T1809885 — 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: mountain beaver Context triple: [Sciuromorpha, hasMember, mountain beaver]
-
A.
Marmot
Marmot is an outdoor apparel and equipment brand known for its high-quality technical clothing, sleeping bags, and tents for activities like hiking, climbing, and camping.
-
B.
Vombatus ursinus
Vombatus ursinus, commonly known as the common wombat, is a burrowing herbivorous marsupial native to southeastern Australia and Tasmania, recognized for its stout body, short legs, and distinctive cube-shaped droppings.
-
C.
Marmotini
Marmotini is a tribe of ground-dwelling squirrels that includes marmots, prairie dogs, and related genera found across the Northern Hemisphere.
-
D.
Beavers
The Beavers are the athletic teams representing Oregon State University in NCAA Division I sports.
-
E.
Beavers
The Beavers are the athletic teams representing the City College of New York in intercollegiate sports.
- 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: mountain beaver Target entity description: The mountain beaver is a burrowing, primitive rodent native to the Pacific Northwest of North America, known for its dense fur, secretive lifestyle, and status as the sole living member of its family Aplodontiidae.
-
A.
Marmot
Marmot is an outdoor apparel and equipment brand known for its high-quality technical clothing, sleeping bags, and tents for activities like hiking, climbing, and camping.
-
B.
Vombatus ursinus
Vombatus ursinus, commonly known as the common wombat, is a burrowing herbivorous marsupial native to southeastern Australia and Tasmania, recognized for its stout body, short legs, and distinctive cube-shaped droppings.
-
C.
Marmotini
Marmotini is a tribe of ground-dwelling squirrels that includes marmots, prairie dogs, and related genera found across the Northern Hemisphere.
-
D.
Beavers
The Beavers are the athletic teams representing Oregon State University in NCAA Division I sports.
-
E.
Beavers
The Beavers are the athletic teams representing the City College of New York in intercollegiate sports.
- F. None of above. chosen
Statements (74)
| Predicate | Object |
|---|---|
| instanceOf |
burrowing animal
ⓘ
extant taxon ⓘ mammal ⓘ rodent ⓘ |
| activityPattern |
crepuscular
ⓘ
nocturnal ⓘ |
| averageLitterSize | 2–3 young ⓘ |
| bodyLength | 30–50 centimeters ⓘ |
| bodyMass | 0.5–1.0 kilograms ⓘ |
| breedingSeason |
early spring
ⓘ
late winter ⓘ |
| burrowDepth | up to about 1 meter ⓘ |
| burrowLength | can exceed 30 meters ⓘ |
| cannot | concentrate urine efficiently ⓘ |
| commonName |
boomer
ⓘ
mountain beaver ⓘ sewellel ⓘ |
| communication |
scent marking
ⓘ
vocalizations ⓘ |
| considered | forest pest in some areas ⓘ |
| constructs |
burrow systems
ⓘ
tunnel networks ⓘ |
| describedBy |
Constantine Samuel Rafinesque
ⓘ
surface form:
Rafinesque
|
| diet | herbivorous ⓘ |
| doesNot | hibernate ⓘ |
| eats |
bracken fern
ⓘ
ferns ⓘ salal ⓘ shrubs ⓘ tree seedlings ⓘ |
| evolutionaryNote | considered one of the most primitive living rodents ⓘ |
| foundIn |
Cascade Range
ⓘ
Pacific coastal ranges ⓘ coastal forests ⓘ humid forests ⓘ |
| furCharacteristic | dense fur ⓘ |
| furColor |
brown
ⓘ
dark brown ⓘ |
| gestationPeriod | about 28–30 days ⓘ |
| gnawingBehavior | girdles tree seedlings ⓘ |
| hasBehavior | secretive ⓘ |
| hasFamily | Aplodontiidae ⓘ |
| hasGenus |
Aplodontia rufa
ⓘ
surface form:
Aplodontia
|
| hasIncisors | ever-growing incisors ⓘ |
| hasOrder | Rodentia ⓘ |
| hasSkullType | protrogomorphous ⓘ |
| hasSuborder | Sciurognathi ⓘ |
| homeRange | small and localized ⓘ |
| isOnlyExtantMemberOf | Aplodontiidae ⓘ |
| IUCNStatus | Least Concern ⓘ |
| lifespanInWild | about 5–6 years ⓘ |
| lifestyle | fossorial ⓘ |
| locomotion |
good digger
ⓘ
poor climber ⓘ |
| nativeTo |
North America
ⓘ
Pacific Northwest ⓘ Southwestern British Columbia ⓘ
surface form:
southwestern British Columbia
western United States ⓘ |
| parentTaxon |
Aplodontia rufa
ⓘ
surface form:
Aplodontia
Aplodontiidae ⓘ Rodentia ⓘ |
| physiologicalTrait | primitive kidney structure ⓘ |
| predators |
bobcats
ⓘ
coyotes ⓘ raptors ⓘ weasels ⓘ |
| prefers | dense understory vegetation ⓘ |
| reproduction | gives birth to altricial young ⓘ |
| requires | moist habitats ⓘ |
| tailLength | 2–4 centimeters ⓘ |
| taxonName | Aplodontia rufa ⓘ |
| taxonRank | species ⓘ |
| uses | underground nests ⓘ |
| waterDependence | high ⓘ |
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: mountain beaver Description of subject: The mountain beaver is a burrowing, primitive rodent native to the Pacific Northwest of North America, known for its dense fur, secretive lifestyle, and status as the sole living member of its family Aplodontiidae.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.