Territorial- und Werbeverhalten des Chinahaselhuhns(Bonasa sewerzowi)

Zusammenfassung

Zwischen 2. und 10. Mai 1997, dem Höhepunkt territorialer Aktivität, wurden im Lianhuashan-Reservat (Gansu, China) Territorial- und Werbeverhalten anhand von 18 farbberingten und besenderten Chinahaselhühnern mittels Ton- und Videotechnik verfolgt. Die Hähne markieren ihre Reviere durch instrumentale Flügelgeräusche, die durch Flattersprünge am Boden, seltener durch Revierflüge hervorgebracht werden. Die Flattersprunghäufigkeit kulminiert am frühen Morgen, die Nahrungsaufnahme am Abend. Die erste Paarung fand am 9. Mai statt.

Summary

Field observations, sound and video recordings of the rare endemic Chinese Grouse were carried out during May 2 and 10, 1997, the optimal time to study display, in the Lianhuashan reserve (Gansu province) at altitudes between 2800 and 3200 m a.s.l. We found the density in spring extraordinarily high: 15 occupied territories/km² in the best studied plot. 18 colour-banded and radio-tagged birds were recorded. We were able to record on tape most of the vocal and instrumental sounds produced by the displaying grouse. Chinese grouse males perform a wing-beat display. The main elements of the territorial activity were variable flutter-jumps on the ground up to 1 m high and 2–4 m wide, sometimes also from a tree to the ground and vice-versa, producing instrumental sounds. An evident peak of flutter jumping activity was observed just after the birds left the roost tree in the morning (5.30 h local time) up to 8 o'clock. Noisy territorial flights in the crowns of trees were rarely observed. The low frequency sounds produced by the wings of the jumping cocks produced a typical impressive morning concert, especially, if 3–4 conflicting males came close together. First copulation was recorded on May 9. In the mating time, flutter jumping activity abated considerably.