Geoffrey A Keller
29 May 2002
- Modoc National Forest, just north of Lava Beds National Monument,
- 1830 meters
- HHB PORTADAT PDR 1000
- Sennheiser MKH 106
- Roche Parabola 74cm/17.7cm (29.1in/7in)
NOTES: "recorded from approx 1045hr to 1130hr. Birds were nesting in verticle cliff face containing lava, cracks and crevasses. The adjacent area contained juniper trees, sagebrush and was adjacent to an agricultural field."