Often meet Tiger Shrikes (Lanius tigrinus) at the fringe of the forest or in open sections of the jungle. This first winter was very vocal and had loud territorial advertising calls. A call recording is located here: https://www.xeno-canto.org/502705. A sonogram and wave of a short segment is shown below. In the waveform you can appreciate the undulating nature of the calls; what you hear in the field is the rising and falling volume of the harsh screeching calls. The sonogram shows that the frequency remain the same, although intensity (loudness) varies. There are 49 to 51 notes in a 6 second burst of continual territorial calls.
Amar-Singh HSS (Dato’ Dr) – Ipoh, Perak, Malaysia
Location: Kledang-Sayong Forest Reserve, Ipoh, Perak, Malaysia
Habitat: Fringe of primary jungle
Date: 15th October 2019
Equipment: Nikon D500 SLR with Nikon AF-S Nikkor 500mm f/5.6E PF ED VR, handheld