Quiller
Erethizon dorsatus
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassMammalia (Mamífers)
- OrderRodentia (Rosegadors)
- FamilyErethizontidae (New World Porcupines)
- GenusErethizon
- SpeciesErethizon dorsatus (Quiller)
Closest Relatives at Yellowstone National Park
Uinta Ground Squirrel
Urocitellus armatus
Yellow-bellied Marmot
Marmota flaviventris
Golden-mantled Ground Squirrel
Callospermophilus lateralis
American Red Squirrel
Tamiasciurus hudsonicus
Tamia mineur
Tamias minimus
Tamia améne
Tamias amoenus
Muskrat
Ondatra zibethicus
American Beaver
Castor canadensis
Uinta Chipmunk
Tamias umbrinus
Northern Pocket Gopher
Thomomys talpoides
Deer Mouse
Peromyscus maniculatus
Bushy-tailed Wood Rat
Neotoma cinerea
📅 Monthly Probability
☀️🌙 When They're Spotted
Active throughout day and night · across all parks (global)
Global Distribution
Where this species is recorded worldwide. Restricted to human observations from 2019 onwards — the same kind of record and the same period the probabilities on this page are built from, so collar-tracking studies, camera-trap arrays and museum specimens are excluded. Around Santa Rosa that removes 5,924 GPS fixes from a handful of tagged jaguars.
where this species is recorded (GBIF density — it tracks where observers go, not how likely a sighting is) · parks where it occurs — tap a pin for the sighting probability there
Parks Where Found
Quick answers
What are the chances of seeing a Quiller in Yellowstone National Park?
About 7% of visitor-days record a Quiller sighting in Yellowstone National Park, based on 12 observer-days of citizen-science data from GBIF.
When is the best time to see Quiller in Yellowstone National Park?
November has the highest sighting rate for Quiller in Yellowstone National Park in our monthly data.