kHz
ML614076390
作者
David Amamoto 该用户提供的媒体文件 档案
日期
地点
Hartwick Pines SP--Old Growth Trail
Crawford, Michigan, United States
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观察细节
Heard only except for brief, distant overhead views that could not be used to ID the birds. It sounded like 20-ish birds were flying in loops overhead as if they were moving between roosts but only 5 were actually seen. Occasionally a single, more distinct bird would call using the slow chip, chip, chip voice, rather than the rapid fire trills.
技术信息
- 录音机
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- 附件
- 原始文件大小
- 1.39 MB