Willow Flycatcher
Empidonax traillii
- KingdomAnimalia (Animals)
- PhylumChordata (Cordats)
- ClassAves (Aus)
- OrderPasseriformes
- FamilyTyrannidae (Tirànids)
- GenusEmpidonax (Empidonax Flycatchers)
- SpeciesEmpidonax traillii (Willow Flycatcher)
Closest Relatives at Yellowstone National Park
Hammond's Flycatcher
Empidonax hammondii
Dusky Flycatcher
Empidonax oberholseri
Pacific-slope Flycatcher
Empidonax difficilis
Least Flycatcher
Empidonax minimus
Western Wood-Pewee
Contopus sordidulus
Olive-sided Flycatcher
Contopus cooperi
Eastern Kingbird
Tyrannus tyrannus
Western Kingbird
Tyrannus verticalis
Say's Phoebe
Sayornis saya
Common Raven
Corvus corax
American Robin
Turdus migratorius
Yellow-rumped Warbler
Setophaga coronata
📅 Monthly Probability
☀️ When They're Spotted
Most active during daytime hours (6am–6pm) · across all parks (global)
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
Quick answers
What are the chances of seeing a Willow Flycatcher in Yellowstone National Park?
About 2% of visitor-days record a Willow Flycatcher sighting in Yellowstone National Park, based on 88 observer-days of citizen-science data from GBIF.
When is the best time to see Willow Flycatcher in Yellowstone National Park?
June has the highest sighting rate for Willow Flycatcher in Yellowstone National Park in our monthly data.