Cassin's Vireo

Cassin's Vireo

Vireo cassinii

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered Endemic
<5% · Rare
overall probability at Big Bend National Park

Closest Relatives at Big Bend National Park

Bell's Vireo
LC

Bell's Vireo

☀️ Diurnal Bird

Vireo bellii

40–50% · Likely
Hutton's Vireo
LC Endemic

Hutton's Vireo

☀️ Diurnal Bird

Vireo huttoni

10–20% · Possible
Plumbeous Vireo
LC

Plumbeous Vireo

☀️ Diurnal Bird

Vireo plumbeus

0–10% · With luck
Warbling Vireo
LC

Warbling Vireo

☀️ Diurnal Bird

Vireo gilvus

0–10% · Rare
Gray Vireo
LC

Gray Vireo

☀️ Diurnal Bird

Vireo vicinior

<5% · Rare
Black-capped Vireo
NT

Black-capped Vireo

☀️ Diurnal Bird

Vireo atricapilla

<5% · Rare
Yellow-throated Vireo
LC

Yellow-throated Vireo

☀️ Diurnal Bird

Vireo flavifrons

<5% · Rare
Red-eyed Vireo
LC

Red-eyed Vireo

☀️ Diurnal Bird

Vireo olivaceus

<5% · Rare
White-eyed Vireo
LC

White-eyed Vireo

☀️ Diurnal Bird

Vireo griseus

Insufficient data
Blue-headed Vireo
LC

Blue-headed Vireo

☀️ Diurnal Bird

Vireo solitarius

Insufficient data
Northern Mockingbird
LC

Northern Mockingbird

☀️ Diurnal Bird

Mimus polyglottos

60–70% · Likely
Common Raven
LC

Common Raven

☀️ Diurnal Bird

Corvus corax

60–70% · Likely

📅 Monthly Probability

<5
Jan
<5
Feb
<5
Mar
<5
Apr
<5
May
<5
Jun
<5
Jul
<5
Aug
0–10
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 Big Bend National Park?

About 3% of visitor-days record a Cassin's Vireo sighting in Big Bend National Park, based on 116 observer-days of citizen-science data from GBIF.

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

September has the highest sighting rate for Cassin's Vireo in Big Bend National Park in our monthly data.

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