Paul A Schwartz
9 Jul 1961
- Rancho Grande; at building
- 10.3666667 -67.6833333
- 1000 meters
- NAGRA III
- Parabola 91.4cm (36in)
NOTES: Neotropical Institute Cut #4. Bulk reel #530
a) Natural song. Apparently only one bird.
b) After playback of a). Apparently only one bird.
c) After playback; now the pair is heard in antiphonal song. Bird #2 and #1 in background.
d) ditto but now focused on bird #2 and #1 in background. Ends with focus on #1 again.