While it is just a stopover for many birds, Singapore also has its own avian permanent residents.
The Kranji Marshes, a 56.8ha freshwater marshland near Sungei Buloh, is home to more than 170 bird species. Here are three of the marshland's signature species.
The blue-eared kingfisher is a solitary and shy bird, which has eyes specially developed to see clearly both in the air and when diving underwater.
It is a rare resident and nationally endangered.
Another uncommon bird, the baya weaver, is found in grasslands and scrubs near fresh water.
The male sings and performs on unfinished nests to attract females.
Once the birds pair up, they complete the nest by adding an egg chamber and entrance tunnel.
The blue-throated bee-eater feeds in the morning on insects, using a long bill which protects it from being stung.
It is a common resident and lives in mangroves, woodlands and open scrub areas.