A male Blue Rock Thrush (Monticola solitarius madoci) that cast a pellet while I was watching but I missed the action. The image (below) showing the pellet near the bird. It was sadly too high to retrieve for examination.
Below is the sonogram and waveform of the common ‘conversational’ calls the bird makes. They are made infrequently and I culled this from 4 different recordings today. An edited recording here: https://www.xeno-canto.org/467662
Their range of vocalisation is under recorded.
Amar-Singh HSS (Dato’ Dr)
Ipoh, Perak, Malaysia
Location: Ipoh, Perak, Malaysia
Habitat: Limestone hill at fringe of city
Date: 20th April 2019
Equipment: Nikon D500 SLR with Tamron SP 150-600mm f/5-6.3 Di VC USD, handheld with Rode VideoMic Pro Plus Shotgun Microphone