Are they the followings ?
I have provided the motivation for my guess.
1) Yellow-browed warbler
Lower bill colour is yellow
Leg colour
Presence of yellow brow
![](http://farm9.staticflickr.com/8500/8308975347_8d76874670_c.jpg)
Flickr 上
grey999hk 的
_MG_0933
2) Common greenshank
Very slightly upward-pointing bill shape
Pale grey colour of head and neck
White underpart
![](http://farm9.staticflickr.com/8363/8308974801_738efe5aeb_c.jpg)
Flickr 上
grey999hk 的
_MG_1389
3) Red-throated pipit
Pale pattern of the head
Coarse black streaks on the back
![](http://farm9.staticflickr.com/8501/8310024988_c63e1fe411_c.jpg)
Flickr 上
grey999hk 的
_MG_0986
![](http://farm9.staticflickr.com/8494/8310025104_04635026f1_c.jpg)
Flickr 上
grey999hk 的
_MG_0977
4) Plain prinia
Brow extends beyond back of its eye
Tail length is almost equivalent to body length
![](http://farm9.staticflickr.com/8497/8310024852_e6bae66f87_c.jpg)
Flickr 上
grey999hk 的
_MG_1314
All seen at LV, 2012.12.24, morning