ML 59102


Barred Forest-Falcon -- Micrastur ruficollis More
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Response to playback: Approach. Response to playback: Normal song. Response to playback: Different song.  

oropendola sp. -- Psarocolius sp.

Paul A Schwartz
30 Nov 1966 at 00:00

  • Venezuela
  • Rancho Grande; km 35
  • 10.3666667   -67.6833333
  • 500 meters
  • Mono
    Sampling Rate
    Bit Depth
  • Electro-Voice 650
  • Parabola 91.4cm (36in)
    Equipment Note

NOTES: Neotropical Institute Cut # 18. Bulk reel: 27; Extra cut(s) on bulk reel: 28; Extra cut length: 6:40 part B, a) Next A.M. almost surely this same bird started @~6:15AM the one-note repeated song. It was somewhat down the hill from me, closer to where I heard it before(except yesterday) but not quite so far down. I didn't record that but immediately began playing the field tape. The bird responded with this repeated one-note song from its same place and could not be brought in close by playback. (In background are calls of flock of Psarocolius (angustifrons?). Quality: 1-2. Level: +5.b) After the bird stopped singing, I went down the hill close to where I figured the bird was. While I was setting up the equipment the bird started to sing this song fairly close to me, a "dawn"- or "bother"-like song. Quality: 1. Level: +3.c) When I played back b), the bird came closer and started singing this way: one-note repeated song but tone @ the beginning is different (lower pitched), but gradually becomes more "normal." Quality: 1. Level: +3.d) I then played back c) and the bird flew right by me and alighted close, in full view, and sang this bother song. Quality: 1. Level: +3.e) The bird then flew to a different place out of sight. After playing back d) the bird came back again and sang this way: ~/= same as in c). Quality: 1. Level: +3.The bird then flew to a different perch, not too far away but out of sight. Playback of d) brought it back immediately and I collected it = adult-plumaged male with large gonads, skull completely ossified).Note: The fact that this bird never reacted to playback in the "female's territory" last week and before, nor even yesterday when it was in the "female's territory," nor at first today when I was still in the female's territory, but did react strongly and repeatedly in this new playback position, leads me to believe that this last position was within its territory and that therefore the male and female maintain individual territories. Perhaps this changes when actual nesting begins. (The female was just beginning to come into breeding condition.) PAS

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