Contributor
Date
Location
- Age
- Not specified
- Sex
- Not specified
- Tags
- No bird
Media notes
Type 2 red crossbill flight calls outlined in red. The characteristic downward-slurring calls with a kink near the middle appear 0.15, 1.15, and 1.35 seconds into the recording. Most of the red crossbills identified in southern California since January 2011 using sonograms have been type 2s. The type 2 variant in this sonogram is among the most common and is seen regularly in sonograms obtained in southern California (mostly from the San Gabriel Mountains). The figure is a screengrab from the program "Audacity." Units on the figure are seconds on the horizontal axis and frequency in kHz on the vertical axis. The recording was obtained as the birds were moving away from us and as the sounds were getting fainter. A possible type 3 call appears between 0.25 and 0.30 seconds into the recording at a weaker signal-to-noise ratio. Recording equipment: Olympus LS-10S equipped with a Sennheiser MKE-400 microphone.
Observation details
Flyovers. Identified by voice but not seen. Distinctive "gyp gyp gyp" calls. I attempted to record them but the calls were very faint. We were a few tens of meters across the water from the island when we heard the birds flying from southeast to southwest. A sonogram from the faint audio recording appears below. We heard at least two birds calling but there could easily have been more.
Technical information
- Dimensions
- 2052 pixels x 616 pixels
- Original file size
- 304.12 KB