ML616432984
作者
Ed Gobbi 该用户提供的媒体文件 档案
日期
地点
Ipswich River Wildlife Sanctuary (Mass Audubon)
Essex, Massachusetts, United States
该地点产生的媒体文件 配图名录- 年龄
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观察细节
At least! At boat ramp with grackles and red winged blackbirds. The photo of Merlin shows the spectogram at 21 seconds because it illustrates for me the difference between the rusty and redwing blackbird ‘sigh’. The latter is the higher-pitched sound and follows the rusty sigh at a lower pitch.
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- 1.98 MB