Cassin's Vireo
Cassin's VireoCassin's VireoCassin's VireoCassin's Vireo

Cassin's Vireo

Vireo cassinii

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
Insufficient data
overall probability at Yellowstone National Park
1 Verified records at Yellowstone National Park
☀️ Diurnal When it's active during daytime hours (6am–6pm)

Cassin's vireo (Vireo cassinii) is a small North American songbird, ranging from southern British Columbia in Canada through the western coastal states of the United States, including California, Oregon, and Washington. The Cassin's Vireo moves down Western United States forests in its migration. During its migration in early spring and late fall, it spends the winter in regions from southern Arizona (the Sonoran Desert) to southern Mexico, including parts of Baja California and the Pacific coast of Mexico. Wikipedia →

Closest Relatives at Yellowstone National Park

Warbling Vireo
LC

Warbling Vireo

☀️ Diurnal Bird

Vireo gilvus

10–20% · With luck
Common Raven
LC

Common Raven

☀️ Diurnal Bird

Corvus corax

80–90% · Very likely
American Robin
LC Endemic

American Robin

☀️ Diurnal Bird

Turdus migratorius

70–80% · Very likely
Yellow-rumped Warbler
LC

Yellow-rumped Warbler

☀️ Diurnal Bird

Setophaga coronata

50–60% · Likely
Mountain Chickadee
LC

Mountain Chickadee

☀️ Diurnal Bird

Poecile gambeli

50–60% · Likely
Chipping Sparrow
LC

Chipping Sparrow

☀️ Diurnal Bird

Spizella passerina

40–50% · Likely
Dark-eyed Junco
LC

Dark-eyed Junco

☀️ Diurnal Bird

Junco hyemalis

40–50% · Likely
Ruby-crowned Kinglet

Ruby-crowned Kinglet

☀️ Diurnal Bird

Regulus calendula

40–50% · Likely
Clark's Nutcracker
LC

Clark's Nutcracker

☀️ Diurnal Bird

Nucifraga columbiana

30–40% · Possible
Mountain Bluebird
LC

Mountain Bluebird

☀️ Diurnal Bird

Sialia currucoides

30–40% · Possible
Violet-green Swallow
LC

Violet-green Swallow

☀️ Diurnal Bird

Tachycineta thalassina

30–40% · Possible
White-crowned Sparrow
LC

White-crowned Sparrow

☀️ Diurnal Bird

Zonotrichia leucophrys

30–40% · Possible

📅 Monthly Probability

📊

Fewer than 5 records of Cassin's Vireo at Yellowstone National Park — not enough to chart months honestly.

☀️ 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
5–10%
4 Sequoia and Kings Canyon National Parks 🇺🇸 United States
5–10%
5 Banff National Park 🇨🇦 Canada
5–10%
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
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