kHz
ML616432984
Contributor
Ed Gobbi Media from this contributor Profile
Date
Location
Ipswich River Wildlife Sanctuary (Mass Audubon)
Essex, Massachusetts, United States
Media from this location Illustrated Checklist- Age
- Not specified
- Sex
- Not specified
- Playback
- Not specified
Observation details
At least! At boat ramp with grackles and red winged blackbirds. The photo of Merlin shows the spectogram at 21 seconds because it illustrates for me the difference between the rusty and redwing blackbird ‘sigh’. The latter is the higher-pitched sound and follows the rusty sigh at a lower pitch.
Technical information
- Recorder
- Microphone
- Accessories
- Original file size
- 1.98 MB