Quiller

Quiller

Erethizon dorsatus

Silhouette: PhyloPic

Daily sighting probability ~10% · With luck
at Yellowstone National Park

In 3 days ~20% in a week ~30%

10 Verified sightings at Yellowstone National Park From 2019 to 2026
449 In all 12 parks
November Best month
☀️🌙 Day & Night When it's spotted

Sounds

Recording0:18

Canada · 2021

© Stewart Zeyl · iNaturalist · CC BY-NC 4.0

Recording0:45

United States · 2024

© Desiree L. Narango · iNaturalist · CC BY 4.0

Recording0:10

Canada · 2017

© Ellen U. · iNaturalist · CC BY-NC 4.0

Global Distribution

Parks Where Found

# Park Country Daily sighting probability
1 Denali National Park 🇺🇸 United States
~50%
2 Acadia National Park 🇺🇸 United States
~40%
3 Katmai National Park 🇺🇸 United States
~30%
4 Elk Island National Park 🇨🇦 Canada
~30%
5 Kluane National Park 🇨🇦 Canada
~30%
6 Badlands National Park 🇺🇸 United States
~20%
7 Banff National Park 🇨🇦 Canada
~20%
8 Jasper National Park 🇨🇦 Canada
~10%
9 Grand Teton National Park 🇺🇸 United States
~10%
10 Zion National Park 🇺🇸 United States
~10%
11 Yellowstone National Park 🇺🇸 United States
~10%
12 Great Bear Rainforest 🇨🇦 Canada
<5%

Cities Where Found

# City Country Daily sighting probability
1 Calgary 🇨🇦 Canada
~20%
2 Edmonton 🇨🇦 Canada
~10%
3 Austin 🇺🇸 United States
~10%
4 San Antonio 🇺🇸 United States
<5%

Before you go

What are the chances of seeing a Quiller in Yellowstone National Park?

With luck

About 10% of wildlife watchers report a Quiller sighting in Yellowstone National Park on a given day, based on 10 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 30th most-seen of the 32 mammals we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.

When is the best time to see a Quiller in Yellowstone National Park?

November

In that month about 20% of wildlife watchers report a Quiller in Yellowstone National Park on a given day, against under 5% in August, October and December–April, the lowest months.

What time of day is best to see a Quiller?

Between 7 and 10 pm

Across all the parks we cover, that three-hour window holds the most Quiller sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is seen both by day and at night.

Where does the Quiller sighting chance come from?

GBIF citizen-science records

It is estimated from how often the Quiller is recorded against all the mammals logged in Yellowstone National Park (10 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.

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