This order contains the even-toed ungulates, i.e. herbivores with two or four toes.
In Singapore, there are 4 species - 1 pig and 3 deer.
Wild Pig (Sus scrofa)When Singapore was developed, the Wild Pig population was decimated, even on Pulau Ubin. Recently, there has been an increase in population, likely from Johor, so much so that this species is now listed as common. Being a prolific breeder and without natural predators, it is likely to come into conflict with human. It can be found at Pulau Ubin, Pulau Tekong, Western Catchment, Central Catchment, Seletar and Changi, as well as the neighbouring wooded areas.
Sambar (Cervus unicolor)The Sambar Deer or Sambar was a deer native to Singapore. It was last sighted in the Bukit Timah area in the 1920s. In the 2000s, they were reintroduced into the Central Catchment area. There are now reportedly 20 of these deer in the wild. This fact came to light when a sambar was knocked down by a car on SLE on 3 Mar 2010.
The other extinct deer in Singapore is the Indian Muntjac (Muntiacus muntjak).
Lesser Mousedeer (Tragulus kancil)The Lesser Mousedeer is the smallest of the mousedeer. They can still be found at Bukit Timah and Central Catchment.
There has been some controversy regarding the identity of the following mousedeer at Lower Peirce.
Greater Mousedeer (Tragulus napu)The Greater Mousedeer is larger than the Lesser Mousedeer. It was thought to be extinct in Singapore until it was rediscovered on Pulau Ubin in 2009. It has also been reintroduced into the Central Catchment. It can be distinguished from the Lesser Mousedeer by the five white stripes on the chest (compared to three on the Lesser Mousedeer).
 Status of Eurasian Wild Pig in Singapore 2010
 Singapore's protected animals and birds
 Rare deer knocked down by car on SLE
 The identity of a mousedeer (Mammalia: Artiodactyla: Tragulidae) observed at Lower Peirce Forest, Singapore
 Rediscovery of Greater Mousedeer, Tragulus napu (Mammalia: Artiodactyla: Tragulidae) in Pulau Ubin, Singapore