ML 60718

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Russet-backed Oropendola -- Psarocolius angustifrons More
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Age/Sex
Identification
Solicitation
Behavior
Note

 

 

 

call

song

Social context: colony

court

perform visual display

copulate

 

 

Paul A Schwartz
3 Apr 1973 at 00:00

    Geography
  • Venezuela
    Aragua
    Locality
  • Rancho Grande; km 13+ (old) (~ = 16.5 new)
    Latitude/Longitude
  • 10.3666667   -67.6833333
    Elevation
  • 900 meters
    Channels
  • Mono
    Sampling Rate
    Bit Depth
    Recorders
  • NAGRA UNSPECIFIED IV
    Microphones
  • Sennheiser MKH 405
    Accessories
  • Parabola 91.4cm (36in)
    Equipment Note

NOTES: Neotropical Institute Cut # 14. Bulk reel: 87Weather: Fair, clear.a) 7:15 AM. Same colony as Cuts 12 & 13. Vocalizations by one bird on branch support at top of nest and other bird inside nest. Quality: 1. Level: +3.Bird inside nest, apparently a female putting finishing touches to the nest construction; bird outside (perhaps/probably? a male) was sitting at point where the nest was supported from the branch. The outside bird was giving the nasal sounds and near the end of the recording these are heard to increase in frequency and intensity: this was when the bird inside came up and was half exposed outside the nest entrance; the other then bowed down to it and gave the increased "whinny." Before this it (he?) would occasionally pick at the nest material wound around the branch, but not actually doing any construction. At the end the bird on top flew first, followed immediately by the other.Note: 1) A Tersina male seems interested in the Psarocolius nests.2) When the male Oropendola arrives at the nest colony he often does so with a loud wing noise. This sound is not made when he flies normally, or even when he arrives accompanying some returning females. Presumably this is a signal to the females present that the "chief" has arrived.b) Later song sesssion by the (a?) male at this colony. Quality: 1. Level: +3. 203 tape.c) Sounds by a "soliciting" female; this is after several mountings by male and perhaps a successful copulation. Quality: 2. Level: +3. 203 tape.Several times this AM I noticed that a female returning to the colony with nest material (usually a leaf which probably indicates nest nearing completion and she is approaching laying condition) stopped on a branch of a tree near the nesting tree and actively solicited copulation: the foreward part of her body is pointed slightly downward and the posterior part upward, the tail inclined even more upward (45¡ to 60¡) and she "whines" and shakes her wings. The male, who is usually returning with her, may mount several times before effecting a successful copulation. (See also comments of 13/4/73 in the notes for "Mixed Colony."In this particular case the male had mounted several times unsuccessfully (the female constantly soliciting--I was watching and unfortunately forgot to tuirn on recorder); then perch beside and upwards of her on an inclined branch facing in the opposite direction, he pecked her vigorously and repeatedly on the rump with his bill, then mounted again and apparently succeeded in the copulation; however, female continued soliciting.

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