ML645022061
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媒体文件注释
These sound like two different call types, but I'm not certain. There is a pretty clear Type 4 call, which is the expected type but the other appears to be slightly lower frequency and a simpler shape in the spectrograph (and perhaps burrier too). It's similar to the shape of Type 3 but not quite the same (which would be really interesting because that is the type most frequently seen in the east). Perhaps it's just a Type 4 calling from further away but not sure that fully explains the lower frequency and apparently different shape.
观察细节
These sound like two different call types, but I'm not certain. There is a pretty clear Type 4 call, which is the expected type but the other appears to be slightly lower frequency and a simpler shape in the spectrograph (and perhaps burrier too). It's similar to the shape of Type 3 but not quite the same (which would be really interesting because that is the type most frequently seen in the east). Perhaps it's just a Type 4 calling from further away but not sure that fully explains the lower frequency and apparently different shape.
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- 657.37 KB