SIGMONSTER AT MT. MAKILING. The first Guaiabero nest (in darkened circle) is about 15 meters high above the ground, built in the fork of a tree trunk which is near a slope.
Here, I position my 350D + Sigmonster on the slope for a better shooting angle, and my camera's elevation is about halfway between the base of the tree and the nest.
The shooting distance is roughly 20 meters. Checking my compass, I note that the entrance hole of the nest is facing east.

[20D + Sigma 10-20, hand held]