Geoffrey A Keller
10 Jun 1990
- 17.0 km NE of Elkhart; Cimarron Nat. Grasslands
- 1000 meters
No locations found with lat/long
- UHER 4200 REPORT MONITOR
- Sennheiser MKH 106T
- Roche Parabola 74cm/17.7cm (29.1in/7in)
NOTES: dawn -1.0hrs; species cut number 10; unknown strata in habitat because it was dark.
BNA: Primary Song is heard. CZ 26/05/2004.