| 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
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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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