I saw a Square-tailed Drongo-Cuckoo (Surniculus lugubris) on 15th April 2022 at the Kledang Saiong Forest Reserve, Ipoh, Perak calling out, perched high up at the top of the canopy. The classical male advertising calls of “pwi, pwi, pwi” in bursts of 5-7 notes (Wells 1999). If you listen careful you will hear a softer, similar answering call; possibly another male. The calls went on for quite a while.
Call recording here: https://xeno-canto.org/upload/success/722433
Dato’ Dr Amar-Singh HSS
Ipoh, Perak, Malaysia