Willow Flycatcher

Willow Flycatcher

Empidonax traillii

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability <5% · Rare
at Saguaro National Park
367 Verified sightings at Saguaro National Park From 2019 to 2026
4,921 Verified sightings across all 62 parks From 2019 to 2026
September Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Willow Flycatcher

The willow flycatcher (Empidonax traillii) is a small insect-eating, migrant bird of the tyrant flycatcher family native to North America. The willow flycatcher was included by the Franco-American ornithologist John James Audubon in his book The Birds of America based on a specimen collected in the "woods along the prairie banks of the Arkansas River". The section of the book containing the willow flycatcher was published in 1828. There are two variants of the plate illustrating the flycatcher. On one the binomial name is given as Muscicapa trailli and on the other as Muscicapa traillii. The latter spelling was used in 1831 by Audubon when describing the species in his Ornithological Biography that was published to accompany the plates and is now the accepted spelling. The specific epithet was chosen by Audubon to honour his friend the Scottish physician and zoologist Thomas Stewart Traill. The willow flycatcher is now one of 14 species placed in the genus Empidonax that was introduced in 1855 by the German ornithologist Jean Cabanis.

There are four subspecies recognized, all of which breed in North America (including three subspecies that breed in California). At one... Wikipedia →

Closest Relatives at Saguaro National Park

Pacific-slope Flycatcher
LC Endemic

Pacific-slope Flycatcher

☀️ Diurnal Bird

Empidonax difficilis

Daily sighting probability <5% · Rare
Gray Flycatcher
LC

Gray Flycatcher

☀️ Diurnal Bird

Empidonax wrightii

Daily sighting probability <5% · Rare
Hammond's Flycatcher
LC

Hammond's Flycatcher

☀️ Diurnal Bird

Empidonax hammondii

Daily sighting probability <5% · Rare
Dusky Flycatcher
LC

Dusky Flycatcher

☀️ Diurnal Bird

Empidonax oberholseri

Daily sighting probability <5% · Rare
Vermilion Flycatcher
LC

Vermilion Flycatcher

☀️ Diurnal Bird

Pyrocephalus rubinus

Daily sighting probability ~50% · Likely
Black Phoebe
LC

Black Phoebe

☀️ Diurnal Bird

Sayornis nigricans

Daily sighting probability ~20% · Possible
Say's Phoebe
LC Endemic

Say's Phoebe

☀️ Diurnal Bird

Sayornis saya

Daily sighting probability ~20% · Possible
Brown-crested Flycatcher
LC

Brown-crested Flycatcher

☀️ Diurnal Bird

Myiarchus tyrannulus

Daily sighting probability ~10% · With luck
Ash-throated Flycatcher
LC

Ash-throated Flycatcher

☀️ Diurnal Bird

Myiarchus cinerascens

Daily sighting probability ~10% · With luck
Cassin's Kingbird
LC

Cassin's Kingbird

☀️ Diurnal Bird

Tyrannus vociferans

Daily sighting probability ~10% · With luck
Western Kingbird
LC

Western Kingbird

☀️ Diurnal Bird

Tyrannus verticalis

Daily sighting probability ~10% · With luck
Tropical Kingbird
LC

Tropical Kingbird

☀️ Diurnal Bird

Tyrannus melancholicus

Daily sighting probability <5% · Rare

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 Daily sighting probability
1 Glacier National Park 🇺🇸 United States
~10%
2 Banff National Park 🇨🇦 Canada
~10%
3 Grand Teton National Park 🇺🇸 United States
~10%
4 Lago de Yojoa 🇭🇳 Honduras
~10%
5 Jasper National Park 🇨🇦 Canada
~10%
6 Olympic National Park 🇺🇸 United States
<5%
7 Point Pelee National Park 🇨🇦 Canada
<5%
8 Death Valley National Park 🇺🇸 United States
<5%
9 Yellowstone National Park 🇺🇸 United States
<5%
10 Yosemite National Park 🇺🇸 United States
<5%
11 Darién National Park 🇵🇦 Panama
<5%
12 Cerro Azul Meámbar National Park 🇭🇳 Honduras
<5%
13 Big Bend National Park 🇺🇸 United States
<5%
14 Manuel Antonio National Park 🇨🇷 Costa Rica
<5%
15 Great Bear Rainforest 🇨🇦 Canada
<5%
16 Cuyabeno Wildlife Reserve 🇪🇨 Ecuador
<5%
17 Joshua Tree National Park 🇺🇸 United States
<5%
18 Yasuní National Park 🇪🇨 Ecuador
<5%
19 Palo Verde National Park 🇨🇷 Costa Rica
<5%
20 Santa Rosa National Park 🇨🇷 Costa Rica
<5%
21 Rincón de la Vieja National Park 🇨🇷 Costa Rica
<5%
22 Pacific Rim National Park Reserve 🇨🇦 Canada
<5%
23 Cockscomb Basin Wildlife Sanctuary 🇧🇿 Belize
<5%
24 Channel Islands National Park 🇺🇸 United States
<5%
25 Saguaro National Park 🇺🇸 United States
<5%
26 Great Smoky Mountains National Park 🇺🇸 United States
<5%
27 Montes Azules Biosphere Reserve 🇲🇽 Mexico
<5%
28 Gandoca-Manzanillo Wildlife Refuge 🇨🇷 Costa Rica
<5%
29 Redwood National Park 🇺🇸 United States
<5%
30 Sequoia and Kings Canyon National Parks 🇺🇸 United States
<5%
31 Carara National Park 🇨🇷 Costa Rica
<5%
32 La Amistad International Park (Panama) 🇵🇦 Panama
<5%
33 Rocky Mountain National Park 🇺🇸 United States
<5%
34 Piedras Blancas National Park 🇨🇷 Costa Rica
<5%
35 Bastimentos Island National Marine Park 🇵🇦 Panama
<5%
36 Zion National Park 🇺🇸 United States
<5%
37 Shenandoah National Park 🇺🇸 United States
<5%
38 Acadia National Park 🇺🇸 United States
<5%
39 Soberanía National Park 🇵🇦 Panama
<5%
40 Tapantí-Macizo de la Muerte National Park 🇨🇷 Costa Rica
<5%
41 Farallones de Cali National Natural Park 🇨🇴 Colombia
<5%
42 Los Quetzales National Park 🇨🇷 Costa Rica
<5%
43 Monteverde Cloud Forest Reserve 🇨🇷 Costa Rica
<5%
44 San Lorenzo Protected Forest 🇵🇦 Panama
Insufficient data
45 La Tigra National Park 🇭🇳 Honduras
Insufficient data
46 Las Baulas Marine National Park 🇨🇷 Costa Rica
Insufficient data
47 Tayrona National Natural Park 🇨🇴 Colombia
Insufficient data
48 Marino Ballena National Park 🇨🇷 Costa Rica
Insufficient data
49 Cahuita National Park 🇨🇷 Costa Rica
Insufficient data
50 Volcán Barú National Park 🇵🇦 Panama
Insufficient data
51 Cañón del Sumidero National Park 🇲🇽 Mexico
Insufficient data
52 Tortuguero National Park 🇨🇷 Costa Rica
Insufficient data
53 Badlands National Park 🇺🇸 United States
Insufficient data
54 Cabo Blanco Absolute Nature Reserve 🇨🇷 Costa Rica
Insufficient data
55 Grand Canyon National Park 🇺🇸 United States
Insufficient data
56 Chirripó National Park 🇨🇷 Costa Rica
Insufficient data
57 Chagres National Park 🇵🇦 Panama
Insufficient data
58 Tenorio Volcano National Park 🇨🇷 Costa Rica
Insufficient data
59 Braulio Carrillo National Park 🇨🇷 Costa Rica
Insufficient data
60 Corcovado National Park 🇨🇷 Costa Rica
Insufficient data
61 Arenal Volcano National Park 🇨🇷 Costa Rica
Insufficient data
62 Everglades National Park 🇺🇸 United States
Insufficient data

Quick answers

What are the chances of seeing a Willow Flycatcher in Saguaro National Park?

Under 5% of wildlife watchers report a Willow Flycatcher sighting in Saguaro National Park, based on 367 verified sightings from GBIF citizen-science data.

When is the best time to see Willow Flycatcher in Saguaro National Park?

September has the highest sighting rate for Willow Flycatcher in Saguaro National Park in our monthly data.

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