Phylum Chordata
> Subphylum Vertebrata > Class Aves |
Shorebirds
and
sea birds
updated
Oct 2016
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
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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
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Role
of shorebirds: Shorebirds
not only feed on the shores but also give back to the shores. Studies
have shown that shorebird poop helps seagrasses to grow and heal
damaged seagrass meadows.
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. |
Bird
poop on the shore.
Chek Jawa, Jan 11
|
Seabirds
resting on the sand bars.
Chek Jawa, Jan 11
|
Lesser crested-terns.
Chek Jawa, Jan 11
|
Pacific
golden plovers.
Chek Jawa, Jan 07
|
Grey
heron.
Kranji Nature Trail, Dec 09
|
Shorebirds on Singapore shores |
Links
References
- Mysterious entrapment of a sand-plover on a sandbar at Chek Jawa,
22 January 2020, Joleen Chan & Ria Tan, Singapore Biodiversity Records 2020: 4-5 ISSN 2345-7597, National University of Singapore.
- Cheah, J. W. K. & A. Ng, 2008. Breeding ecology of the little tern, Sterna albifrons Pallas, 1764 in Singapore. Nature in Singapore, 1: 69–73.
- 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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