ML 74586

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Rodrigues Warbler -- Acrocephalus rodericanus More
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Jennifer F. M. Horne
5 Nov 1974 at 05:25

    Geography
  • Mauritius
    Rodrigues Island
    Locality
  • 574.0 km E of Mauritius; Solitude; Cascade Pigeon; Rodrigues
    Latitude/Longitude
  • -19.6833333   63.4166667
    Channels
  • Mono
    Sampling Rate
    Bit Depth
    Recorders
  • STELLAVOX SP7
    Microphones
    Accessories
    Equipment Note

NOTES: CAT NO. 74586, Part A: Time: 0525. Date: 5 Nov 1974. Identified by sight and sound. Confidence in ID: 100%. Recordist's Tape #71B/72A. Bkground Sounds: Village (morning) sounds, Geopelia striata, Acridotheres tristis, Diptera sp., Pteropus rodricensis, Foudia flavicans. No. of Animals/Sex: 2 adults, one male, one female. Range Status: Normal, highly endangered. Sound Category: Song, call. Stimulus for Sound: Natural (no playback), then playback own song. Behav. Context: Advertising, mate contact, foraging, "nest construction." Cut Length: Part A: 11:59.) HPF 220 Hz. Male sings either side and "all round" nest site! and as he visits (each time) he sings! "(Flight) display" was short bursts of exaggerated flight (with "short" fast wingbeats). The soft hum/purr is "mate-contact" close it is the male and female together at nest singing/calling together. [sic] "Time check" are included: they indicate the times the male/female came to the nest site and continue constructing--6:34 mins. playback response . The mate/contact call "purring"--but the response was mostly silence except for "purring." Bats heard. Several. The pair (both worked at it) were constructing and one of them carried in a white downy feather for the inner construction/lining. (ex. domestic fowls!). 0710 see continuation notes.
PARTS B & C: Time: 0525. Date: 5 Nov 1974. Identified by sight and sound. Confidence in ID: 100%. Recordist's Tape #72B. No. of Animals/Sex: 2 adults, one male, one female. Range Status: Normal, highly endangered. Sound Category: Song, call. Stimulus for Sound: Natural (no playback), then playback own song.) HPF 220 Hz. 0655 The male and female coming/going around the ongoing nest construction. They called from trees around the nest and then close to it. Several other male can be heard in the background with their "canopy singing" advertising. 0710 is the same--many purring calls or "trills."
PART C has the purr (trill) likely female (male can utter it, too). Also some males "canopy singing" i.e. when males find a high point in the "canopy" (5 meters)! & sing for extended periods--NOT always at dawn. Part B 10:12, Part C 01:35.

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