What is that Bird in Vietnam without Tail?

The birds in Vietnam without tail (or with tail too short to be seen) could be:

1/ Pygmy cupwing (Pnoepyga pusilla) or pygmy wren-babbler

2/ Grey-bellied tesia (Tesia cyaniventer)

3/ White-browed piculet (Sasia ochracea)

4/ King quail (Synoicus chinensis), also known as the blue-breasted quail, Asian blue quail

5/ Japanese quail (Coturnix japonica), also known as the coturnix quail