ML 7953

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Couch's Kingbird -- Tyrannus couchii More
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song

dawn song

 

 

Brown-crested Flycatcher -- Myiarchus tyrannulus

L. Irby Davis
William Guion
17 May 1961 at 04:30

    Geography
  • Mexico
    Campeche
    Locality
  • 31.0 km W of HOPELCHEN
    Elevation
  • 75 meters
No locations found with lat/long
    Channels
  • Mono
    Sampling Rate
    Bit Depth
    Recorders
  • NAGRA III
    Microphones
  • Electro-Voice 650
    Accessories
  • Parabola 101.6cm (40in)
    Equipment Note

NOTES: Background: WHITE THROATED BOBWHITE (COLINUS SP.); General climate: DRY; SEMI-DESERT SAVANNAH. THERE SEEMED TO BE ABOUT NINE TYRANNUS MELANCHOLICUS SATRAPA PRESENT IN THE AREA TO ONE TYRANNUS COUCHII, BUT AT ONE SPOT A BIRD OF EACH SPECIES WAS SINGING THEIR SPECIES-SPECIFIC DAWN SONG AT THE SAME TIME WHILE PERCHED Sex: 10 UNKNOWNON BUSHES THAT WERE ONLY ABOUT 5-6 METERS APART. THE TWO SONGS OVERLAP ON THE TAPE. ON 10 JUNE 1979 IDENTIFIED AS TYRANNUS COUCHII BY L.I. DAVIS. ON 02 JULY 1979 IDENTIFIED AS TYRANNUS MELANCHOLICUS SATRAPA BY L.I. DAVIS. IDENTIFIED AS T. COUCHII BY T. P [T. A. Parker III]

[There are four parts to this recording, the first two contain the Regularly Repeated Vocalizations (RRV) of Smith (1966. Communication and relationships in the genus Tyrannus. Publ. Nuttall Ornith. Cl. 6), which presumably represent the "Dawn Songs" of BNA. Each RRV is preceded by a variable number of "Tzeeeeerrhhh" Calls (or Compound Vocalizations; CdVs). The third part of the recording has these same vocalizations (RRVs) overlapping the songs (or RRVs) of Tyrannus melancholicus. Finally, the last part has seven RRVs of T. melancholicus without any T. couchii (as far as I can determine). Quality changed from 1 to 1-2, 2 - CAM - 22 December 2004]

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