ML179739331
- 年齡
- 未確定
- 性別
- 未確定
- 行為
- 飛行中
- 聲音
- 飛行叫聲
- 回播
- 未確定
影音備註
Recorded 19:22 EDT as they were entering a roost chimney and swirling around; over 3,000 CHSW present.
觀察細節
Conservative estimate, based on counting 100x100 of swirling flock. The swifts entered the chimney at 215 South McDowell (News & Observer) from 7:14 until 7:30. About 10 per second entered the chimney over a period of 15 minutes. There were breaks in between where they were swirling, so another estimate was based on 500 birds entering the chimney per minute for a total of 7 active minutes. They started the entry at 7:14 and the last bird entered at 7:30.See photos.
技術資訊
- 錄音機
- 麥克風
- 配件
- 原始檔案大小
- 2.73 MB