• Skip to content
Macaulay Library Macaulay Library
Search
Not found
Not found
Menu
Close

Main navigation

  • Search
  • Resources
  • Dashboard
  • Merlin
  • About
  • Help

Secondary navigation

  • Donate
  • Sign in

Language

  • Čeština
  • Deutsch
  • English
  • Español (América Latina)
  • Español (España)
  • Euskara
  • Français
  • עִברִית
  • Italiano
  • 日本語
  • Монгол
  • Norsk
  • Português (Portugal)
  • Português (Brasil)
  • Русский
  • Türkçe
  • Українська
  • 中文 (繁體)
  • 中文(简体)

ML635381251

Dusky Flycatcher Empidonax oberholseri

Report

Contributor

Chris Dong Media from this contributor Profile

Date

9 May 2025 eBird checklist S235163285

Location

Grasslands Regional Park
Yolo, California, United States
Media from this location Illustrated Checklist
Map
Map Coordinates: 38.4959689, -121.6941027
Age
Not specified
Sex
Not specified
Playback
Not specified

Media notes

Impressively, Merlin correctly called this as DUFL and also correctly called the "whits" from the GRFL 8 days ago

Observation details

Initially I heard 2 whits coming from around (38.4954256, -121.6933240) when I first arrived. I didn’t see or hear anything after so I assumed it might have been something else. An hour later; I noticed an empid in an oak from where I heard the whits earlier. It was a dusky/hammonds type with a round eyering, grayish color and medium sized bill. I approached for a closer look and I was able to observe it for about 5 minutes on and off as it did some fly catching. I first looked at its primary projection which was extremely short and blunt, not like the tweeners that have been documented recently. I also got a good view of the underside of its bill which was quite hefty with a pale base, almost like a GRFL. However, this bird mostly sat still, and it would lift its tail slightly up then down with no downward tail drops observed. Its head was also more rounded and not as flat as I would expect for GRFL. I lost sight of it as I began to text Julian, and I heard a WEFL call close by. I thought I might’ve missed the ID entirely and that it was a drab western when I heard 2 whit calls which I thankfully was recording. I saw the bird and a WEFL take off to the east into the oak stand before others arrived. We scoured the oak stand for the next 2 hours, and Josh and Julian each got a brief encounter. However this bird was an escape artist and mostly quiet besides 1 or 2 whits it would occasionally give, and we could never refind it or be sure of where it moved to. At one point, all three of us heard a clear whit in between us and we still couldn’t even get a glimpse. Overall, based on the recordings, initial observations, and corroboration with Julian and Josh, I am comfortable calling this a Dusky.

Technical information

Recorder
Microphone
Accessories
Original file size
466.88 KB

Cornell Lab of Ornithology

Collections and Guides

  • Cornell Guide to Bird Sounds: United States and Canada
  • Radio Expeditions
  • Internet Bird Collection
  • Oriental Bird Club Image Database

Resources

  • Preparing and uploading media
  • Recording tips
  • Using and rating media
  • Request media
  • Target species
  • Photo + Sound Quiz
  • Audio editing tutorials
  • Setting up recording apps
  • Choosing recording gear
  • Sound recording workshops
  • Student opportunities

About

  • History
  • Our team
  • Contact
  • Land acknowledgement
  • Web accessibility assistance
  • Privacy policy
  • Terms of use
Donate

Follow us

Cornell University Cornell University
© 2025 Cornell University