ahbeng04, I find that once you start 'seeing' a nep in the area, you will suddenly see more and more, like your eyes have been 'opened'. Even at
Genting Highlands, it always happen to me each time I go and see neps. At one trip, after about 15 mins, I realise that I was stepping on baby macs and baby sanguineas, that I didn't see in the first place