Hi guys, I used to be a regular at Sungei Buloh but have not been there lately. Just my two cents' worth...
When going to Sungei Buloh, I assume you're interested to shoot birds, nature, flowers, insects, etc.
2 - 4 pm sounds like an 'awkward' time...
The migratory birds are in, but active mostly in the early morning or late evening. In the middle of the day when it's hot, they're mostly hiding some place and resting. If you're planning a trip there, best is to be there like 0730 - 0800h, shoot whatever you can and by say 1000h latest 1100h, it's time to pack up.
Let me know if you guys plan something. I'll see if I can join you guys. Unless you're shooting macro, you are going to need your longest telephoto lens (plus converter plus tripod) if you want to capture any decent shots.
br/porcupine