“Eastern Crowned Warblers (Phylloscopus coronatus) are not easy to see on migration or at their breeding grounds (above, below). But at least in summer they make a variety loud calls and songs and can be located.
“Below is a sonogram and waveform of a short segment of the song to show 4 different kinds of notes. Other have better described the song/calls but I would like to bring attention to a buzzing note that the bird makes intermittently; seen in the waveform as ‘sausage-shaped’ note.
Dato’ Dr Amar-Singh HSS
Ipoh, Perak, Malaysia
7th June 2019
Location: East Hokkaido, Japan