Gregory F Budney
2 Jun 1997
- Yellowstone National Park, near Tower Falls
- 44.8851944 -110.4128056
- 1960 meters
- HHB PORTADAT PDR 1000
- Telinga Parabola 54.7cm/15.5cm (21.5in/6.1in)
NOTES: Notes on tape: "Birds are flying in and out of roosts or possibly nesting cavities, and out over the river. ...Group of 10-15 birds; I am focusing on individuals or couples or triplets that fly in to the rock face and then disappear into crevasses... ...Telinga was in cut."