Wilbur L Hershberger
27 Jun 1998
- E of Middle Creek WMA
- 40.1644444 -76.3994444
- 150 meters
- SONY TCD-D10 PRO II
- Sennheiser ME 62
- Roche Parabola 74cm/17.7cm (29.1in/7in)
NOTES: Song sparrow would bob head up and down while producing the flute-like notes. Kind of a pumping action of the head. Maybe used to change the shape of the trachea.
Changed song type. Also at a higher pitch.
Filtered at 250 Hz.
BNA: The Song is heard. CZ 25/06/2004.