Sound stimulation was (other): playback other species.
Paul A Schwartz
13 Jun 1973
- Rio Querecual; a long road from Boca de Tigre to Santa Ines
- 9.7 -64.45
- 75 meters
- NAGRA UNSPECIFIED IV
- Sennheiser MKH 405
- Parabola 91.4cm (36in)
NOTES: Neotropical Institute Cut #E-1. Bulk reel #500
Eastern Venezuela. cf. also Cut 19 for phrase from ca. Guanape, Anzoategui.
Cloudy throughout the period of Cut E-1, with occasional drizzle or light rain.
Song type 1 = SO-SOO-la; 2 = SO-SO-LA; 3 = SO-LAA.
Majority of birds in this region are type 1 singers, but I heard also both types 2 & 3, both of them "typical" of the north-central region. (Type 2 heard in Cut E-2, a). Perhaps due to the "favorable" weather (cloudy, sporadic light rain) the birds sing periodically throughout AM. At ~ 11:30 AM, when the birds were not singing, I started playback of prepared tape loops. Played, in following sequence, each ~ 5' play, then ~ 5' silence: C. noctivaga, C. cinnamomeus [sic] (both Davis & Gockfeld), C. boucardi (Lancaster - Brit. Hond.), ditto (Davis - Mexico), C. undulatus 3-figure -- No apparent reaction to these; then played [illegible], the long type 1 erythropus from Surinam--no apparent reaction; then played type 1 from llano and very shortly birds started singing and the bird of part d) started coming closer; then I switched back to Surinam phrase and bird came closer still, after which time part d) was recorded. The results are inconclusive: birds apparently initially triggered only by type 1 llano (of those played), which is ~ same type song as their own, but then long Surinam seemed to work equally well after birds started. (However, I have no way of being sure that when birds began to sing it was not just another spontaneous song session of their own; but it seems they were probably triggered.)
Final note: No further song heard; therefore at ~ 2:00 PM I tried whistling imitations, and as no reaction, I played field loop of "llanos 1" song, including doing so on trail across river but absolutely no reaction then, nor up to the time of my leaving area at 2:30 PM. It remained cloudy all the day. However, I returned to area ~ 8:45 PM and at 9:00 and again at 10:00
PM I heard the birds singing, including the high-voiced bird. Thin cloudy, the moon shining through as a light spot at 11:25 PM. They sang again at 11:45 PM.
a) 6:30 AM. Birds 100-200 m. distant and not in direct focus, due to intervening trees and perhaps other obstructions. At least two birds: one with type one song, slightly higher pitch; one with type 1 to 1-3, slightly lower pitch. Quality: 2-. Level: +3. 3.75 ips. 203 tape. LN.
The effect of 3 in this song comes mainly from lack of direct focus; however, the 3rd figure of this phrase is proportionately very short.
b) 7:45 AM. Weather: Cloudy. Song, apparently by second bird of part a). This first is with bird still somewhat distant for comparison of sound difference between that and bird nearer and in more direct focus. Throughout the period of this recording, I whistled periodically type 1 song to keep bird near. Quality: 2-, Level: 0; 1-2, Level: [blank]; 1, +3. 3.75 ips & 7.5 ips.
Ortalis ruficauda, Dromococcyx phasianellus in background.
As it seemed the second bird of a) was on my side of river and not too distant, I went into the woods to point I thought might be near it and whistled type 1 song. I was not sure of any reaction, vocal or other, and so returned to camp. A short while later this bird began to sing and approach slowly in the direction of the thickets alongside the road near camp. It was apparently reacting to my previous imitations and attempt to decoy it.
c) 11:10 AM. Weather: Cloudy. The tinamous sang periodically during the AM. This is another bit with two birds, perhaps same two as in part a). Quality: 2. Level: +3.
d) 12:00 M. Weather: Cloudy, drizzly. Probably same bird as in part b). Voice comments about prior playback trials. Quality: 1-. Level: +3.
This bird then collected = male #8801.