|An adult in the early morning at the forest fringe. I was surprised it was not calling out as many birds I have seen over the years call in mornings 8-10am. I saw it subsequently chased away by a Common Iora Aegithina tiphia.
The close up is to show the lighter lower mandible which some authors describe as greenish-grey (Wells 1999, Cuckoos of the World).
Regarding the subspecies for my region:
Johannes ErritzÃ¸e, Clive F. Mann, Frederik P. Brammer and Richard A Fuller. (2012) Cuckoos of the World. Helm Identification Guides use Cacomantis sonneratii sonneratii.
Wells 1999 & HBW 2020 use Cacomantis sonneratii malayanus.
Howard & Moore 4th Edn (2013) do not recognize malayanus.
Birds of the World (Cornell) now incorporating HBW (accessed 28 August 2020) note 'Proposed race malayanus (Peninsular Malaysia) is synonymized with nominate'. - Ed.