Most Singaporeans would know what a scorpion is but most would not have seen one before. In fact, there has not been any extensive study on this group of animals in Singapore. Nowadays, scorpions can mainly be found in forested areas, like the Botanic Gardens, Bukit Timah, Central Catchment, Pulau Ubin, Sungei Buloh, etc.
The following list is tentative and non-exhaustive as studies on these animals are really lacking. The Heterometrus are large black scorpions with robust pincers. The dark Liocheles also has robust pincers, but is much smaller. The other two are brown scorpions with slender pincers, but Lychas has longer tail than Isometrus.
Asian Forest Scorpion (Heterometrus longimanus)
Malaysian Black Scorpion (Heterometrus spinifer)
Lesser Brown Scorpion (Isometrus maculatus)
Long-tailed Scorpion (Lychas scutilus)
Dwarf Wood Scorpion (Liocheles australasiae)
Lychas scutilus can be sexed by the elongated tail of the male. Left: Male at Sungei Buloh ©Lau JS. Right: Female at Rifle Range ©Eddy Lee