Thought Id add a recent update to the access at Muara Angke.
I was present on 09 October 2015. The boardwalk is still closed by the looks of it.
Onsite at dawn I met a local ranger type who was around the entrance buildings and prevented me from accessing the boardwalk. I think he suggested I required a permit, available from somewhere else in Jakarta.
I birded the roadside and entrance area and saw both Sunda Coucal and Black-winged Starling from the road. I would recommend doing this at dawn when traffic is at its lowest, as the road along the southern boundary (Jalan Pantai Indan Utara II) is very busy, even at 05:30am. I didnt attempt to access the western boundary road (Mediterania Boulevard), which has a security gate.
After hanging around for an hour a second ranger turned up, and after chatting to him for 20mins, he did let me access the boardwalk. It is still in a bad state of repair and requires careful balancing to get anywhere along it. In the first open area Bar-winged Prinia were frequent.
In order to get to the site at dawn I stayed at the nearest hotel i could find - the Ozone Hotel, which is a 20min walk away. The cost of a room was 500,500 IDR for a twin/double.
http://www.ozonehoteljakarta.com/
Google Earth Screengrab attached.
Out of interest is anyone able to provide a reliable history of the Black-winged Starling at this location?