Rufous-bellied Eagle-Aquila kienerii
After some discussion via many forum, I can conclude that the bird that I think a falcon (the bird in KL bird park) is actually an eagle! Still lots of thing that I have to learn about this species.
The bird is actually Rufous-bellied Eagle-Aquila kienerii. Some member in the falconry forum mention that they can fly like a falcon… well, based on their face, they look like a falcon! … but when we observed their feet, it have feather like an eagle.
Here is the information about the bird which I get from the wiki:
Rufous-bellied Eagle, (Aquila kienerii), is a bird of prey in the family Accipitridae, which also includes the buzzards, hawks and Old World vultures.
Rufous-bellied Eagle breeds in tropical Asia. It is resident in Sri Lanka, southwest and northern India, and east to southeast Asia and Indonesia.
This species is associated with woodland. The large stick nest is built in a tree and a single egg is laid.
Rufous-bellied Eagle is a smallish eagle, 54-60 cm long. It has broad rounded wings, held flat while soaring, and a short broad tail. It eats mainly birds and small mammals.
The adult has blackish upperparts and head. The foreneck and breast are white, and the tail and flight feathers are white barred with dark. The rest of the underparts are chestnut. Sexes are similar.
The immature eagle has white in place of the adult’s chestnut plumage, and dark flank patches.
Here is the photo of the bird:
