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Phylum Chordata > Subphylum Vertebrata > Class Aves
Shorebirds and
sea birds

updated Oct 09

Where seen? These rather drab but very interesting birds can be seen on and flying over our mudflats and sandflats especially during the migratory season of September to March. These are shorebirds visiting from afar. They are sometimes also called waders as they are often seen wading in water.

A group of whimbrels on the shore.
Chek Jawa, Jan 07
Seabirds are those that hunt mainly fish on open waters or coastal areas, rather than feeding on the mudflats like shorebirds. Some seabirds are also migratory.

Why do shorebirds migrate? Many shorebirds breed in the northern regions, some as far as the sub-Arctic. Summer in such places is short but hot, with the sun overhead almost 24 hours a day. During this season, plants and insects are plentiful. Shorebirds are among those that take advantage of this seasonal abundance to breed.

Winter in such places, however, is sharsh. Thus shorebirds migrate southwards in autumn. In spring, most journey back north to their breeding grounds.

On their long journeys, shorebirds depend on wetlands and intertidal flats such as Chek Jawa. Here they rest and refuel on 'fast food': high-energy food that can be harvested quickly. A chain of such wetland stopovers forms a flyway. Singapore is part of the East Asian-Australasian Flyway. Often, migratory birds must fly non-stop between such stopovers as there are no suitable habitats for them in between. The destruction of such 'stepping stones' can affect the continued existence of these marvellous birds.

Route a migrating
shorebird might take
on the East Asian-
Australasian Flyway
Status and threats: The Red List of threatened animals of Singapore include resident seabirds such as the Black-naped tern (Sterna sumatrana) and Little tern (Sterna albifrons) which are listed as 'Endangered', and the Great-billed heron (Ardea sumatrana) which is listed as 'Critically Endangered'. They are primarily threatened by habitat loss as well as human disturbance of their nesting sites.

Seabirds resting on the sand bars in the horizon, with shorebirds closer to the front.
Chek Jawa, Jan 07


Pacific golden plovers.
Chek Jawa, Jan 07

Sandpiper.
Kranji Nature Trail, Dec 09


Reef egret
Tanah Merah, Dec 09

Grey heron.
Kranji Nature Trail, Dec 09


Pacific golden plovers.
Tanah Merah, Dec 09

Striated heron.
Sungei Buloh Wetland Reserve, Feb 10


Great-billed heron
Chek Jawa, Jan 10


Links

References

  • Davison, G.W. H. and P. K. L. Ng and Ho Hua Chew, 2008. The Singapore Red Data Book: Threatened plants and animals of Singapore. Nature Society (Singapore). 285 pp.
 
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