ML642044755
作者
日期
地点
- 年龄和性别
- 未成年性别未知 - 2
- 行为
- 发声中
- 发声
- 鸣叫
- 回放
- 未使用回放
媒体文件注释
Unlike clip ML642045083, the bird on the right is only giving its typical begging squawk (i.e., not also uttering a trills). The calling bird has been holding a hidden prey item (a small bird) for at least 10 minutes before I began recording, hence the drooped wings.
观察细节
Two videos of an immature (the "right" owl) calling near its sibling (on the left). The second video shows the "right" owl TRILLING repeatedly. The second video is 2 minutes 8 seconds and consists 3 parts (because I deleted quiet periods in the original 5-minute clip). The "right" owl calls in the following sequence, where T = trill, S = squawk (the usual begging call), and C = bill clacking: Part 1, TTSSSTTTSSTTTTS; part 2, STTTTTTTTS; part 3, STTSSSCSCSSSTTTT. The 3 parts are 53.2, 27.5, and 48.1 seconds each. Only in the last part is the "right" owl's bill visible, showing the bird opening its bill while trilling. The calling bird had been holding a hidden prey item (a small unknown) for at least 10 minutes before I began recording, hence its drooped wings.
技术信息
- 相机
- 话筒
- 附件
- 原始文件大小
- 169.99 MB