报告

作者

日期

eBird记录 S60224379

地点

Chimney Swift Roost--Downtown Raleigh
Wake, North Carolina, United States
该地点产生的媒体文件 配图名录
地图
地图 坐标: 35.7786554, -78.6404747
年龄
未说明
性别
未说明
行为
飞行
发声
飞行鸣叫
回放
未说明

媒体文件注释

Recorded 19:25 EDT as they were entering a roost chimney and swirling around; over 3,000 CHSW present.

观察细节

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.

技术信息

录音机
话筒
附件
原始文件大小
2.27 MB