There are about 110 species of reptiles in Singapore . [1] Most of them are small or rarely seen, but there are a few which are large or prominent. The largest reptiles found in Singapore are the estuarine crocodile and the reticulated python. The ones most commonly seen in urban areas are the house geckos [2] (typically called house lizard by the lay-person) and the invasive changeable lizard. The changeable lizard has pushed the local green crested lizard into forested areas.
In gardens and parks, one can often see common sun skinks, the introduced red-eared sliders and flying lizards.
Water monitors are common in rivers and mangrove. Another monitor that can be found in Singapore is the clouded monitor, which is a forest species. It is smaller than the Malayan water monitor, has slit nostrils and is paler in colour. In 2008, the Dumeril's monitor was rediscovered in the Central Catchment Nature Reserve. [3]
Equatorial spitting cobras can still be found in desolated urban areas of Singapore. The larger king cobra is much rarer. The banded krait sometimes show up as road kill. There are also 2 species of oral snake and 9 species of sea snake.
François Marie Daudin was a French zoologist.
The Bukit Timah Nature Reserve is a 1.7-square-kilometre (0.66 sq mi) nature reserve near the geographic centre of Singapore, located on the slopes of Bukit Timah Hill, the country's highest natural peak standing at a height of approximately 165 metres (541 ft), and parts of the surrounding area, located actually in Bukit Panjang. The nature reserve is about 15 kilometres from the Downtown Core, Singapore's central business district (CBD).
Singapore has about 65 species of mammals, 390 species of birds, 110 species of reptiles, 30 species of amphibians, more than 300 butterfly species, 127 dragonfly species, and over 2,000 recorded species of marine wildlife.
Igneous rocks are found in Bukit Timah, Woodlands, and Pulau Ubin island. Granite makes up the bulk of the igneous rock. Gabbro is also found in the area and is found in an area called Little Guilin, named for its resemblance to Guilin in South China. This area is in Bukit Gombak. Sedimentary rocks are found on the western part of Singapore, which is mainly made of sandstone and mudstones. It also includes the southwestern area. Metamorphic rocks are found in the northeastern part of Singapore, and also on Pulau Tekong, off the east coast of Singapore. The rocks are mainly made up of quartzite, and also make up the Sajahat Formation.
The Singaporean government has established four nature reserves in Singapore. They are the Bukit Timah Nature Reserve, Central Catchment Nature Reserve, Labrador Nature Reserve, and Sungei Buloh Wetland Reserve.