Cassin's Vireo

Cassin's Vireo

Vireo cassinii

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
10–20% · With luck
overall probability at Glacier National Park

Closest Relatives at Glacier National Park

Warbling Vireo
LC

Warbling Vireo

☀️ Diurnal Bird

Vireo gilvus

30–40% · Possible
Red-eyed Vireo
LC

Red-eyed Vireo

☀️ Diurnal Bird

Vireo olivaceus

0–10% · With luck
American Robin
LC Endemic

American Robin

☀️ Diurnal Bird

Turdus migratorius

70–80% · Very likely
Red-breasted Nuthatch
LC

Red-breasted Nuthatch

☀️ Diurnal Bird

Sitta canadensis

50–60% · Likely
Black-capped Chickadee
LC

Black-capped Chickadee

☀️ Diurnal Bird

Poecile atricapillus

50–60% · Likely
Dark-eyed Junco
LC

Dark-eyed Junco

☀️ Diurnal Bird

Junco hyemalis

40–50% · Likely
Mountain Chickadee
LC

Mountain Chickadee

☀️ Diurnal Bird

Poecile gambeli

40–50% · Likely
Common Raven
LC

Common Raven

☀️ Diurnal Bird

Corvus corax

40–50% · Likely
Yellow-rumped Warbler
LC

Yellow-rumped Warbler

☀️ Diurnal Bird

Setophaga coronata

40–50% · Likely
Pine Siskin
LC

Pine Siskin

☀️ Diurnal Bird

Spinus pinus

30–40% · Possible
Chipping Sparrow
LC

Chipping Sparrow

☀️ Diurnal Bird

Spizella passerina

30–40% · Possible
Cedar Waxwing
LC

Cedar Waxwing

☀️ Diurnal Bird

Bombycilla cedrorum

30–40% · Possible

📅 Monthly Probability

<5
Jan
<5
Feb
<5
Mar
<5
Apr
20–30
May
20–30
Jun
10–20
Jul
0–10
Aug
<5
Sep
<5
Oct
<5
Nov
<5
Dec

☀️ When They're Spotted

Most active during daytime hours (6am–6pm) · across all parks (global)

☀️Diurnal
☀️🌙🌙12am6am12pm6pm12am

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

# Park Country Probability
1 Yosemite National Park 🇺🇸 United States
20–30%
2 Glacier National Park 🇺🇸 United States
10–20%
3 Jasper National Park 🇨🇦 Canada
0–10%
4 Sequoia and Kings Canyon National Parks 🇺🇸 United States
0–10%
5 Banff National Park 🇨🇦 Canada
0–10%
6 Death Valley National Park 🇺🇸 United States
<5%
7 Zion National Park 🇺🇸 United States
<5%
8 Big Bend National Park 🇺🇸 United States
<5%
9 Great Bear Rainforest 🇨🇦 Canada
<5%
10 Cumbres de Monterrey National Park 🇲🇽 Mexico
<5%
11 Guadalupe Mountains National Park 🇺🇸 United States
<5%
12 Redwood National Park 🇺🇸 United States
<5%
13 Grand Canyon National Park 🇺🇸 United States
<5%
14 Olympic National Park 🇺🇸 United States
<5%
15 Joshua Tree National Park 🇺🇸 United States
<5%
16 Grand Teton National Park 🇺🇸 United States
<5%
17 Rocky Mountain National Park 🇺🇸 United States
<5%
18 Channel Islands National Park 🇺🇸 United States
<5%
19 Reserva de la Biosfera Mariposa Monarca 🇲🇽 Mexico
Insufficient data
20 Yellowstone National Park 🇺🇸 United States
Insufficient data

Quick answers

What are the chances of seeing a Cassin's Vireo in Glacier National Park?

About 13% of visitor-days record a Cassin's Vireo sighting in Glacier National Park, based on 579 observer-days of citizen-science data from GBIF.

When is the best time to see Cassin's Vireo in Glacier National Park?

June has the highest sighting rate for Cassin's Vireo in Glacier National Park in our monthly data.

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