ML620361464
Contributor
Date
Location
- Age
- Not specified
- Sex
- Not specified
- Sounds
- Call
- Playback
- Playback not used
Media notes
These clips from the same territory over 11 min (0608-0619) exhibit multiple examples of three call types, Zweeoo (first at 0.224 sec), Churr (first at 3.411 sec), and Pip (first at 17.758 sec). Zweeoo and Pip (Pieplow's Breer and Peep) are the standard nomenclature promulgated by R. C. Stein. For Churr (Pieplow's Dzeer) see http://www.appliedbioacoustics.com/Repertoires/Passeriformes/Tyrannidae/Empidonaxalnorum/bird.html#ALFLchurr. These examples of Churr are unusual in that the pitch trend is descending rather than flat, but I believe they are best understood as this call-type. The combination of call-types suggests nest defense. Zweeoo is used for nest defense (but also singing from an exposed perch) in both Alder and Willow Flycatchers. The Pips suggest alarm, and the multiple Churr calls are unusual, but consonant with the Complex Call in suggesting aggression. This nest defense interpretation is supported by the intense pip-calling given later in the day after pish-stimulation, and by the silent and sudden entry of an Alder Flycatcher into a nearby shrub thicket. In several visits to this location, I heard only one song (Feebeeo) and one Double-peak call.
Additional species
Technical information
- Recorder
- Zoom H4n
- Microphone
- Wildtronics Pro Mono
- Accessories
- Parabolic Microphone
- Original file size
- 27.62 MB