ML 59661

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Ferruginous Pygmy-Owl (Ferruginous) -- Glaucidium brasilianum [brasilianum Group] More
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Human Imitiation
 

song

 

Sound stimulation was (other): playback. Response to playback: Approach.  

Paul A Schwartz
6 Jun 1966 at 12:15

    Geography
  • Venezuela
    Zulia
    Locality
  • Carretal (near Guarero)
    Latitude/Longitude
  • 11.37   -72.07
    Elevation
  • 90 meters
    Channels
  • Mono
    Sampling Rate
    Bit Depth
    Recorders
  • NAGRA III
    Microphones
  • Electro-Voice 650
    Accessories
  • Parabola 91.4cm (36in)
    Equipment Note

NOTES: Neotropical Institute Cut # 12. Bulk reel: 60
Weather: Fair.
a) Bird whistled in, but had been around almost all night. Quality: 1-2. Level: +5.
b) After playback of a). Quality: 1. Level: +5.
Immediately after the playback the bird sang partially with a voice much higher, seemed almost an octave higher. I tried to induce this again but couldn't, obtained only a little bit at a slightly higher pitch. (These phrases are of longer duration than those of a).)
Note, however, that at a later place the owl is slightly out of "focus" and then is brought in "focus" and in doing so tghe tone seems higher. This may indicate that the normal song has much high frequency in it, which is emphasized by the parabola.

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