Golden-bellied Gerygone aka Golden-bellied Flyeater (Gerygone sulphurea).
I was walking around the Balaring mangrove forest in Silay, Philippines and this bird "played" with me a bit, constantly flying around me. I was wearing RealTree camouflage so I think it was curious why a tree was walking.
The problem I had with capturing more of this specimen was my lens was too long! I came in with a 500mm so I could setup some decent shots from a distance when this particular bird came in a few feet of me. It would have been better with a 300mm. This bird was slightly taller than the size of my thumb.