unknown bird in Cat Tien NP, Vietnam (1 Viewer)

[beechwood]

Here are 2 views of the same bird seen in the grass at the margins of Crocodile Lake in Cat Tien National Park on 24 Jan.
The distinctive head markings should make identification easy but I can't find anything similar so would welcome some assistance. Thanks.

 

[01101001]

Yellow-eyed Babbler??

 

[johnallcock]

Plain Prinia. The lighting and angle are accentuating the paler supercilium.

 

[beechwood]

Good call. When you said it I was struggling to see it but, having looked at a range of photos, I see what you mean. The greenish hue of the belly seems to be more evident when pictured in green grasses. Who said "the camera never lies"?