Alder Flycatcher

Empidonax alnorum

Silhouette: Emily Willoughby · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered

KingdomAnimalia (Animals)
PhylumChordata (Chordates)
ClassAves (Birds)
OrderPasseriformes (Perching Birds)
FamilyTyrannidae (Tyrant Flycatchers)
GenusEmpidonax (Empidonax Flycatchers)
SpeciesEmpidonax alnorum (Alder Flycatcher)

Daily sighting probability Insufficient data

at Arenal Volcano National Park

1 Verified sightings at Arenal Volcano National Park From 2019 to 2026

2,994 Verified sightings across all 50 parks From 2019 to 2026

☀️ 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 Arenal Volcano National Park

Empidonax flaviventris

Daily sighting probability ~10% · With luck

Empidonax flavescens

Daily sighting probability <5% · Rare

Empidonax virescens

Daily sighting probability <5% · Rare

Empidonax minimus

Daily sighting probability <5% · Rare

Empidonax albigularis

Daily sighting probability <5% · Rare

Empidonax traillii

Daily sighting probability Insufficient data

Pitangus sulphuratus

Daily sighting probability ~60% · Likely

Myiozetetes similis

Daily sighting probability ~50% · Likely

Tyrannus melancholicus

Daily sighting probability ~50% · Likely

Myiozetetes granadensis

Daily sighting probability ~30% · Possible

Todirostrum cinereum

Daily sighting probability ~30% · Possible

Myiarchus tuberculifer

Daily sighting probability ~30% · Possible

See all 12 relatives Show fewer

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

← Back to Arenal Volcano National Park

Alder Flycatcher

About the Alder Flycatcher

Recent sightings of Alder Flycatcher in Arenal Volcano National Park

Closest Relatives at Arenal Volcano National Park

Yellow-bellied Flycatcher

Yellowish Flycatcher

Acadian Flycatcher

Least Flycatcher

White-throated Flycatcher

Willow Flycatcher

Great Kiskadee

Social Flycatcher

Tropical Kingbird

Gray-capped Flycatcher

Common Tody-Flycatcher

Dusky-capped Flycatcher

Global Distribution

Parks Where Found