Butterfly kingdom.

Botanic Garden.

Jurong Bird Park.

Reptile Park.

Singapore Zoo
Singapore Zoo famously adopts an 'open zoo' concept where animals live in spacious and landscaped environments as close as possible to that of their natural habitat.
Butterfly & Insect Kingdom
Fans of butterflies and insects will enjoy the Butterfly & Insect Kingdom, located on Sentosa Island. It features about 3,000 species of butterflies and insects with an exhibition hall explaining their life cycle as well as an informative frame collection.
Underwater World
This famous oceanarium offers a collection of about 2,500 marine creatures from 250 species as well as a popular dolphin show. One of its highlights is the walk-through tunnel which makes one really feel like being underwater.
Jurong Bird and Reptile Park
This 202,000sqm bird park is located on the western slope of Jurong Hill and houses about 8,000 birds from 600 different species. This is Southeast Asia's largest reptile park, featuring over 50 species of reptiles including crocodiles, komodo dragons, snakes and tortoises.
Singapore Botanic Garden
The garden has developed into something quite unique, featuring a small tropical rainforest, a ginger garden and an orchid garden. The National Orchid Garden has a collection of more than 1,000 species and 2,000 hybrid orchids.
Singapore Night Safari
Another unforgettable experience for animal lovers is a visit to Singapore’s Night Safari. Not only does it do a good job of displaying tropical animals by night, it also has shows and dining outlets.

White Tigers.

References

Background Picture.

Atractions in Singapore.

White tigers.