ML 74611

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Rodrigues Warbler -- Acrocephalus rodericanus More
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Age/Sex
Identification
Solicitation
Behavior
Note

 

100%

Sight and Sound

 

 

 

 

Jennifer F. M. Horne
7 Nov 1974 at 10:30

    Geography
  • Mauritius
    Rodrigues Island
    Locality
  • 574.0 km E of Mauritius Island; Cascade Pigeon; Rodrigues
    Latitude/Longitude
  • -19.6833333   63.4166667
    Channels
  • Mono
    Sampling Rate
    Bit Depth
    Recorders
  • NAGRA III-B
    Microphones
    Accessories
    Equipment Note

NOTES: CAT. NO. 74611, FIRST DATA PAGE: (DATES AND TIMES THE SAME ON BOTH PAGES.) Identified by sight and sound. Confidence in ID: 100%. Recordist's Tape #76A. Bkground Sounds: Pteropus rodricensis, Foudia madagascariensis, Acridotheres tristis. No. of Animals/Sex: adult(s), 2 males, 1 female. Range Status: Normal, Highly endangered. Sound Category: Song. Stimulus for Sound: Playback own song. Field Recorder: Nagra IIIB. Cut length: 12:20.) HPF 220 Hz. 1030 hrs. Rain had ceased and it is clear. Much "canopy singing" which had been stimulated by playback. Two males were involved per my field notebook, not three as annotated. Field annotations included and a notation re: Mastertape #75B as the first annotation in the field refers to that tape edited in 1995 (now 1966) to LNS #72271. Three birds present, two singing, one called. The male and female still were at the nest.
CAT. NO. 74611, SECOND DATA PAGE: Time: 1030. Date: 7 Nov. 1974. Identified by sight and sound. Recordist's Tape #76A. No. of Animals/Sex: adult(s), male(s), female(s). Range Status: Normal, ENDANGERED. Breeding Status: Territorial, breeding. Sound Category: Song, call. Stimulus for Sound: Playback own song. Response to Playback: Approach. Field Recorder: Nagra IIIB. Cut Length: 1220.) Playback does bring the animals closer--but the main reaction apeared to be later with much "canopy singing" as the males re-established territorial-"boundaries." There were several "physical encounters" males attacking each other--annotated--We boosted the level on the "2nd call" in the LNS copy, this call was not heard very often. A "tsek-tsek-tsek" (chatter [illegible word] call) annotation included. "1200 hrs" is a nest visit. Field annotations included--the last annotation " - - - - - - "Bird from nest "i.e. the territorial male) drove them smartly off."

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