Alder Flycatcher
Alder FlycatcherAlder FlycatcherAlder FlycatcherAlder Flycatcher

Alder Flycatcher

Empidonax alnorum

Silhouette: Emily Willoughby · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~10% · With luck
at Acadia National Park
1,385 Verified sightings at Acadia National Park From 2019 to 2026
2,994 Verified sightings across all 50 parks From 2019 to 2026
June Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Alder Flycatcher

The alder flycatcher (Empidonax alnorum) is a small insect-eating bird in the tyrant flycatcher family. The genus name Empidonax is from Ancient Greek empis, "gnat", and anax, "master". The specific alnorum is Latin and means "of the alders".

E. alnorum is one of the larger Empidonax species, attaining a length of 13–17 cm (5.1–6.7 in), and a weight of 12–14 g (0.42–0.49 oz). The wingspan ranges from 21–24 cm (8.3–9.4 in). The upperparts of E. alnorum are dull greenish-olive. The crown is a slightly darker olive-green than the back. The throat is white, with a darker breast band. Thin white rings surround the eyes. The bill is wide and moderate in length, with pinkish or yellow-orange lower mandible and black upper mandible. Wings are generally black, with white wing bars and white edges of the innermost secondaries (tertials). Juveniles have brownish upperparts, yellow underparts, and yellowish brown or buff wingbars.

E. alnorum is similar in appearance to the eastern wood pewee (Contopus virens) and the eastern phoebe (Sayornis phoebe), as well as the nearly identical willow flycatcher (Empidonax traillii) but E. alnorum can be distinguished by its smaller size and... Wikipedia →

Closest Relatives at Acadia National Park

Least Flycatcher
LC

Least Flycatcher

☀️ Diurnal Bird

Empidonax minimus

Daily sighting probability <5% · Rare
Yellow-bellied Flycatcher
LC

Yellow-bellied Flycatcher

☀️ Diurnal Bird

Empidonax flaviventris

Daily sighting probability <5% · Rare
Willow Flycatcher
LC

Willow Flycatcher

☀️ Diurnal Bird

Empidonax traillii

Daily sighting probability <5% · Rare
Eastern Phoebe
LC

Eastern Phoebe

☀️ Diurnal Bird

Sayornis phoebe

Daily sighting probability ~30% · Possible
Eastern Wood-Pewee
LC

Eastern Wood-Pewee

☀️ Diurnal Bird

Contopus virens

Daily sighting probability ~10% · With luck
Great Crested Flycatcher
LC

Great Crested Flycatcher

☀️ Diurnal Bird

Myiarchus crinitus

Daily sighting probability <5% · Rare
Eastern Kingbird
LC

Eastern Kingbird

☀️ Diurnal Bird

Tyrannus tyrannus

Daily sighting probability <5% · Rare
Olive-sided Flycatcher
LC

Olive-sided Flycatcher

☀️ Diurnal Bird

Contopus cooperi

Daily sighting probability <5% · Rare
American Crow
LC

American Crow

☀️ Diurnal Bird

Corvus brachyrhynchos

Daily sighting probability ~80% · Very likely
Black-capped Chickadee
LC

Black-capped Chickadee

☀️ Diurnal Bird

Poecile atricapillus

Daily sighting probability ~70% · Very likely
Song Sparrow
LC

Song Sparrow

☀️ Diurnal Bird

Melospiza melodia

Daily sighting probability ~60% · Likely
American Goldfinch
LC

American Goldfinch

☀️ Diurnal Bird

Spinus tristis

Daily sighting probability ~50% · Likely

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Wood Buffalo National Park 🇨🇦 Canada
~10%
2 Wrangell-St. Elias National Park 🇺🇸 United States
~10%
3 Acadia National Park 🇺🇸 United States
~10%
4 Isle Royale National Park 🇺🇸 United States
~10%
5 Katmai National Park 🇺🇸 United States
~10%
6 Cape Breton Highlands National Park 🇨🇦 Canada
~10%
7 Madidi National Park 🇧🇴 Bolivia
~10%
8 Gros Morne National Park 🇨🇦 Canada
~10%
9 Gandoca-Manzanillo Wildlife Refuge 🇨🇷 Costa Rica
<5%
10 Cordillera Azul National Park 🇵🇪 Peru
<5%
11 Bastimentos Island National Marine Park 🇵🇦 Panama
<5%
12 Point Pelee National Park 🇨🇦 Canada
<5%
13 Chagres National Park 🇵🇦 Panama
<5%
14 La Amistad International Park (Panama) 🇵🇦 Panama
<5%
15 Rincón de la Vieja National Park 🇨🇷 Costa Rica
<5%
16 Denali National Park 🇺🇸 United States
<5%
17 Everglades National Park 🇺🇸 United States
<5%
18 Marino Ballena National Park 🇨🇷 Costa Rica
<5%
19 Kenai Fjords National Park 🇺🇸 United States
<5%
20 Montes Azules Biosphere Reserve 🇲🇽 Mexico
<5%
21 Parque Natural Metropolitano 🇵🇦 Panama
<5%
22 Palo Verde National Park 🇨🇷 Costa Rica
<5%
23 Sierra de la Macarena National Park 🇨🇴 Colombia
<5%
24 Manuel Antonio National Park 🇨🇷 Costa Rica
<5%
25 Piedras Blancas National Park 🇨🇷 Costa Rica
<5%
26 Tambopata National Reserve 🇵🇪 Peru
<5%
27 Carara National Park 🇨🇷 Costa Rica
<5%
28 Monteverde Cloud Forest Reserve 🇨🇷 Costa Rica
<5%
29 Soberanía National Park 🇵🇦 Panama
<5%
30 Braulio Carrillo National Park 🇨🇷 Costa Rica
<5%
31 Farallones de Cali National Natural Park 🇨🇴 Colombia
<5%
32 Shenandoah National Park 🇺🇸 United States
<5%
33 Isla del Coco National Park 🇨🇷 Costa Rica
Insufficient data
34 El Impenetrable National Park 🇦🇷 Argentina
Insufficient data
35 Henri Pittier National Park 🇻🇪 Venezuela
Insufficient data
36 Biotopo Cerro Cahuí 🇬🇹 Guatemala
Insufficient data
37 Cahuita National Park 🇨🇷 Costa Rica
Insufficient data
38 Lago de Yojoa 🇭🇳 Honduras
Insufficient data
39 Santa Rosa National Park 🇨🇷 Costa Rica
Insufficient data
40 Amboró National Park 🇧🇴 Bolivia
Insufficient data
41 Puracé National Natural Park 🇨🇴 Colombia
Insufficient data
42 Volcán Barú National Park 🇵🇦 Panama
Insufficient data
43 Darién National Park 🇵🇦 Panama
Insufficient data
44 Cabo Blanco Absolute Nature Reserve 🇨🇷 Costa Rica
Insufficient data
45 Las Baulas Marine National Park 🇨🇷 Costa Rica
Insufficient data
46 Tenorio Volcano National Park 🇨🇷 Costa Rica
Insufficient data
47 Tortuguero National Park 🇨🇷 Costa Rica
Insufficient data
48 Los Nevados National Natural Park 🇨🇴 Colombia
Insufficient data
49 Arenal Volcano National Park 🇨🇷 Costa Rica
Insufficient data
50 Tapantí-Macizo de la Muerte National Park 🇨🇷 Costa Rica
Insufficient data

Quick answers

What are the chances of seeing a Alder Flycatcher in Acadia National Park?

About 10% of wildlife watchers report a Alder Flycatcher sighting in Acadia National Park, based on 1,385 verified sightings from GBIF citizen-science data.

When is the best time to see Alder Flycatcher in Acadia National Park?

June has the highest sighting rate for Alder Flycatcher in Acadia National Park in our monthly data.

← Back to Acadia National Park