ML 67912


Band-tailed Guan -- Penelope argyrotis More
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mechanical sound



Paul A Schwartz
13 Apr 1970 at 05:45

  • Venezuela
  • Rancho Grande; km 21
  • 10.3666667   -67.6833333
  • 1050 meters
  • Mono
    Sampling Rate
    Bit Depth
  • Electro-Voice 650
  • Parabola 91.4cm (36in)
    Equipment Note

NOTES: Neotropical Institute Cut # 56. Bulk reel: 382203 tape.1)Ascending whistles, then a display. Quality: 3. Level: +3.Arrived just before 5:30 AM, clear. First sound, a display way up hillside, @ ~ 5:37. Other displays, also way up hillside, heard after that. Then, a display heard closer. Then from this position, ~ the same position as the recording of Cut 55, there came ascending whistles and a display; in the display the bird circled back as yesterday, planing all the while, but this time landed near the starting point but not exactly at it. After this there were two incomplete whistles and a display (not recorded).2) Whistles, cries, whines, displays. Quality: 2-3. Level: +3.From the new position after this there came whines, a couple "aos," then a display. Then aos, whistles, and a display. Then aos, whines, whistles, and displays; the whines are not given by the displaying bird; the whistles apparently are given by displaying bird. Then whistles and displays; then "ao" calls* (also scream by Ciccaba virgata). (Note: @ one place it seems female flew but male remained and he then followed, after some time, with a display; it seems fairly clear that he began the display just (about) immediately on taking off from perch. (Later note says male apparently always, or almost always, begins display immediately on takeoff.) Also, that during display the wings beat so rapidly they are just a blur and not possible to see if [stands?] together above and below bird, but when played @ 1/2 speed, except for first couple of beats, the beats sound as if they are double.*This bird, which is almost surely the displaying bird, then flew down to feed on some cecropias; shortly I saw another bird in there, too, and it may have already been there when the other (the male, presumably), flew down. (Therefore ? once the female is more interested in eating than in being displayed to, the male stops displaying and joins her in pre-mating behavior.) Tape 203. Recap of field notes of Cut 56:First activity, all displays, was well up the ravine, well above A [letters refer to map recordist drew which cannot be replicated here]. Whether of the birds of this "territory" or not, I don't know. However, @ ~ 5:42 a display was heard closer, in about the same position as Cut 55.Recording 1. Parabola focused on that point: ascending whistles and finally a display, with bird circling back (see 1) on editing sheet). Subsequently, while I was trying to focus on the bird's new position, it gave two incomplete whistles, then a display. Apparently the female had previously moved and after this display the male alighted +/- near her; the birds now positioned roughly: female @ A, male near A.Recording 2) Parabola focused on A and can hear whine by female and "ao" calls. What bird gives these I can't be sure; perhaps a third bird, or p erhaps the male, although the display soon heard, and after which a bird is heard to alight in the tree @ A (where presumably the female was whining), seems to start (from its sound) further away than where the bird calling "ao" would seem to have been. However, this may be due to parabola artefact and probably the "ao" bird and displaying bird are same (see 3). Shortly after, the female flew from A to B and in this new position, she gave some "ao" calls.Recording 3) Focus still on A where male gives "ao" calls @ beginning ("ao" calls by female heard in background @ beginning) and then ascending whistles and finally a display flight with his coming to rest @ ~ A-1.Recording 4) Focus then shifts to B where female is calling "ao." Apparently hearing the male giving whistles fairly close she reacts by altering the "aos" to +/- whines and she shows an excitged vocal reaction when the male then makes a display flight (a condition I've frequently noted in the different subsequent observations at other sites: 17/III/73). The male's flight has brought him close to the female this time and hear whines by female and ascending whistles by male. The female apparently moved away through trees, still whining, and male lmade another display flight. Then the female flew actoss road to somewhere between D & E, an area where the birds have been foraging in the early mornings on cecropia and other trees after the display period. The male, after a short visit, obviously silent but with an occasional short call, made a display flight over to C.Recording 5) In position C the male gave a few ascending whistles (only one recorded, the rest "lost" during focusing) and then made a display flight to D. From there he moved to D with a normal flight and began calling "ao" (recorded); when he heard answering "aos" by female, who had moved to E, he flew down there and subsequently both birds were found feeding there. This was ~ 6:00 AM.Note: While birds feeding I tried playing the recordings from Colonia Tovar that I think are "crows" of this species. The result was not enlightening. The birds stopped feeding ~ 1/2 way through recording and first one flew across road to undergrowth, quietly followed by the other (which seemed to be smaller and was perhaps the female); they then disappeared up the hill.

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