ML 138146

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Gyrfalcon -- Falco rusticolus More
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Sight and Sound

 

 

call

 

 

Brian J McCaffery
2 Jun 2007 at 00:00

    Geography
  • United States
    Alaska
    Locality
  • Ingakslugwat Hills
    Latitude/Longitude
  • 61.37   -161.9886
    Elevation
  • 170 meters
    Channels
  • Mono
    Sampling Rate
  • 48kHz
    Bit Depth
    Recorders
    Microphones
  • Sennheiser MKH 20
    Accessories
  • Telinga Parabola 54.7cm/15.5cm (21.5in/6.1in)
    Equipment Note

Take 8 began just 5 seconds after Take 7 (ML 138145) ended, as male flew to perch site near nest. Because of the respective positions of the female at the nest and the male at the nearby perch, I could not always determine which sex was calling.

In addition, a number of the vocalizations recorded seemed intermediate between calls described in the BNA account (i.e., sounds like a graded communication system). The nomenclature used here follows that, but the researcher revising the BNA account (Travis Booms, with whom I work on this project, and with whom I consulted on all of these recordings) is hoping to go over these recordings with Tom Cade, to make sure everyone has a common nomenclature. Thus, the call names here might change.

Introductory wails and then chitter and/or chatter over the first ten seconds. 0:36-0:38--reminded Booms of a female begging call. 0:51 wail, 0:57-0:59 two wails. For the record, I have not noted all the bouts of chick calls in the following minutes of the take. Also detected during this first minute of the take: FOSP, REDP, NOWA, YWAR. 1:07 - 1:15 probably 4 male and 1 female wail; 1:23 - 1:27 probably 2 male and then 2 female wails. Chicks then heard occasionally. 1:58 single adult wail. Also YWAR, NOWA, FOSP, AMRO, REDP. 2:04 -- 5 clicks on hand-held radio (signal from my colleague several hundred m away to make sure that I was awake and recording!). Also YWAR, GCTH, NOWA. 3:24 -- wail, followed by chicks chuffing (and later squealing). Also GCTH, YWAR, REDP. 4:31 -- probably male wail as female departed from nest; male departed at 4:38. Broken wails by adult circling nest/blind area at 4:55. Also YWAR, GCTH, ATSP, SAVS, REDP. 5:59 -- female back on nest. Also REDP, YWAR, FOSP, SAVS, GCTH.

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