First is the lesser known resident of the rotten logs, Aegus Chelifer (aegus chelifer)
Next,the well known invaders of oil palm plantations,the coconut rhinoceros beetle (oryctes rhinoceros)
These beetles are found almost everywhere with bright lights and near coconut trees. One such location is sembawang park.
Next is the bess beetle, the squeaky stag beetle (passalidae sp.)
These are commonly found in and under rotting logs,and if you pick them up,they will screech or as i like to call,squeak.
Last but not least is the well known big rhino beetle, the gideon beetle
(xylotrupes gideon beckeri) *below pictures belong to Nicky Bay
So far,this beetle's locations are:
Tampines eco green
Sungei buloh wetland reserve
Dairy goat farm
*keep note these are not ALL the beetles that are found in singapore.For references visit Beetle@sg.