ML 15543

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Yellow-faced Grassquit -- Tiaris olivaceus More
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Playback Self
 

mechanical sound

song

 

Response to playback: Different song.  

Blue-and-white Mockingbird -- Melanotis hypoleucus
Rufous-collared Robin -- Turdus rufitorques
Glossy-black Thrush -- Turdus serranus

Walter A Thurber
16 May 1974 at 06:30

    Geography
  • El Salvador
    Santa Ana
    Locality
  • HACIENDA MONTECRISTO
    Latitude/Longitude
  • 14.4333333   -89.3666667
    Elevation
  • 2300 meters
    Channels
  • Mono
    Sampling Rate
    Bit Depth
    Recorders
  • UHER 4000 REPORT IC
    Microphones
    Accessories
  • Parabola 45.7cm (18in)
    Equipment Note

NOTES: Cover density: OPEN; RAPID TRILL OR BUZZ. AT TIMES AT THE CONCLUSION OF A TRILL THE BIRD STRETCHED HIS NECK FORWARD, OPENED HIS MOUTH, AND QUIVERED HIS WINGS AS THOUGH SINGING WITH ALL HIS STRENGTH--YET NOTHING COULD BE HEARD. BY APPROACHING TO LESS THAN 3M AND IN 1 MALE(S)CREASING THE GAIN OF RECORDER I COULD CAPTURE A SOUND. PLAYBACK GIVES A BRUSHING SOUND OR A MINOR-LEAGUE BRONX CHEER--VERY LITTLE FOR SO MUCH APPARENT EFFORT OF THE PART OF THE BIRD. PERHAPS MUCH OF THE VOCALIZATION IS ULTRASONIC. OPEN CULTIVATED AREA WI

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