Paul A Schwartz
21 Apr 1965
- Rancho Grande; km 30
- 10.3666667 -67.6833333
- 800 meters
- NAGRA III
- Electro-Voice 650
- Parabola 91.4cm (36in)
NOTES: Neotropical Institute Cut # 6. Bulk reel: ; Extra cut length: 3:04
a) 1900 hours to 1915 hours. First: one scream, natural then: screams and hoots by high-voiced bird in focus and hoots by lower-voiced bird in background (Note: probably same pair as Cut 5); result after playback of first natural scream.
7:15 PM to 7:50 PM. After more playback. One bird, apparently the low-voiced bird, gives a bother sound somewhat similar to the low-key hoot of Otus choliba under similar circumstances. These are in background and later we hear a hoot in background, presumably by same bird. Bird in focus gives hoots in higher-pitched voice; it then continues with screams, too. Quality: 1. Level: 0.
Then "high hoots" continue with different background and best gain so far.
A continuation of "high hoots" but recorded slightly off focus to minimize excessive emphasis of high-frequency elements by the parabola.
8:15 PM. Then in last part, high-voiced bird (female) has changed position and the lower-voiced bird (male) is again heard. Then the female adds some screams again.
Note: This pair of birds was collected and it was found that bird with higher voice is the female and one with lower voice the male.