Red billed malkoha, Gunung Tampin

Stumbled into a pack of 4 malkohas in mating ritual (I think). The birds were nodding their head like a male turtle dove only less frequent. The birds will follow you on the trees as you walk, sometimes nodding their head as if chasing you away.

Start of the head nodding, the feathers around the head is fluffed to make the head bigger.

Red-billed Malkoha
Phaenicophaeus javanicus