kHz
作者
Philip Kline 该用户提供的媒体文件 档案
日期
地点
Vedanta Retreat
Multnomah, Oregon, United States
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观察细节
One bird tooting on and off again at north end of clearcut. A second bird joined it briefly a couple of times. Toots sounded slightly higher pitched, so possibly a female. Birds of the World notes equivocal data on whether the toots of both sexes are different, but at least one source notes that female toots are higher pitched (both sexes are known to toot). Given that I heard a second bird with a distinctly, if slightly, higher toot, I think the safest assumption is that it was a different sex.
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- 1.37 MB