Paul A Schwartz
9 Apr 1970
- Rancho Grande; km 21
- 10.3666667 -67.6833333
- 1050 meters
- NAGRA UNSPECIFIED IV
- Electro-Voice 650
- Parabola 91.4cm (36in)
NOTES: Neotropical Institute Cut # 7. Bulk reel: 229
a) Vocalizations by a pair of birds, now perched, but that had been flying around, circling around, one following the other, in an apparent courtship flight. In latter part is Psarocolius angustifrons male in song; apparently two different males @ colony. Quality: 1-2. Level: 0.
3 3/4 copy from orig. @ 7.5; filt. 400/7 kHz (due to motor noise in background).
b) A flying "flock": eight birds, grouped as four pair, circling around, apparently "aimlessly" calling. This seems a rather typical behavior. Quality: 3. Level: 0.