Response to playback: Approach.
Paul A Schwartz
18 May 1966
- 0.4 km E of river; Rio Grande; El Palmar
- 7.9666667 -61.8833333
- 250 meters
- NAGRA III
- Electro-Voice 650
- Parabola 91.4cm (36in)
NOTES: Neotropical Institute Cut # 4. Bulk reel: 125
a) This is a different individual than any recorded so far. It had been singing naturally but stopped before I could get to record. The present cut was made after playback of the field tape caused this bird to sing again. (Faint in background is Turdus albicollis.) Quality: 1. Level: 0. b)3:10 PM. Possibly same bird ~1hour later w/ no further playback. Quality: 1. Level: +5.
LNS Note: Internal announcements' amplitudes raised without change to song interval - JN