Hi Bart,
I've just discovered ebirder and I am getting to know it a little better. Lam Tsuen valley, where I live, would give you three of those birds fairly easily- the pipit, warbler and bunting (in order of likelihood). The Whites Thrush is about but hard to pick up regularly. I always found it in winter on the Peak, at the Mt Austin park (which should also provide the pipit). Citrine Wagtail is not so easy but Long Valley would be a good site.
I am sure others will have plenty of suggestions.
Dylan
