Paul A Schwartz
31 May 1968
- Rio Grande; ~ 1 km north of km 9.5; El Palmar
- 7.9666667 -61.8833333
- 250 meters
- NAGRA III
- Electro-Voice 650
- Parabola 91.4cm (36in)
NOTES: Neotropical Institute Cut # 11. Bulk reel: 37
Weather: Light cloudy. Natural vocalization; birds in distance. Quality: 2-3, 2. Level: +14.
(There's a fair probability that these may be same birds as in Cut 10.)
Bird started with one-note song (3-5 min.) then changed to two-note, then to three-note song. Just about this time a second bird starts with one-note then two-note songs. Note that its voice is lower in pitch and also that the first bird became silent for a short while right after the other started.
Then second bird stops. Then after some time the first also stops with two-note phrases at end.
Perhaps this is a pair.