- 年齡
- 未確定
- 性別
- 未確定
- 行為
- 飛行中
- 聲音
- 飛行叫聲
- 回播
- 未使用回播
影音備註
Recorded with an autonomous recording unit strapped to a tree. I was outside at the time but about 100 meters from the recorder, which was closer to the birds than I was.
觀察細節
Identified by emphatic flight calls. Heard and recorded. Birds not seen. The calls are typical of type 2s: slightly more than 0.05 seconds in duration, rapidly downward-sweeping in frequency with a distinct "kink" about 1/2 between the maximum and minimum frequency. Very common type 2 call seen and heard often in California. I was able to record only 3 calls but heard more before I got the recorder turned on. The birds appeared to land near the top of eastern white pines, which are loaded with cones.
技術資訊
- 錄音機
- Wildlife Acoustics Song Meter Mini
- 麥克風
- 配件
- 原始檔案大小
- 1.53 MB