Thanks for the replies!
Well OGIGA, most of the mantids found in Malaysia used to be widespread in Singapore as well. Due to urbanization, it has become increasingly difficult to find mantids such as the D. Lobata, D. Dessicata, H. Coronatus and other exotic species.
That does not prove though, that those species doesn't exist here. We still have some forests left and there have been occasions of people finding the above-mentioned mantids.
Singapore is located at the southern tip of Malaysia by the way.