The reserve functions as a "refueling point" for the waders to
feed and roost. These habitat-specific birds feed on the polychaetes
(worms) found in the mudflats of the Reserve.
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Waders or shorebirds are so-called because they wade in the shallow
water in search of food. Plovers and sandpipers are common waders
found in the reserve. With their different bill length and feeding
habits, they are able to tap on different food sources found in the
mudflats. This enables them to co-exist in the same habitat.
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Egrets at the reserve are white and more slender than herons in
appearance. They are frequent visitors during the migratory season.
The Little Egret is often seen dashing about, chasing after its prey
in the shallows.
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The Grey and Purple Heron can be seen at the reserve throughout
the year. During the nesting season, they breed in colonies on
top of mangrove trees. Typically, the male will search for sticks
to present to the female for the construction of their nest.
The Grey and Purple Heron are among the largest birds in Singapore,
commonly found feeding at the ponds in the reserve. They adopt a
stalk and stab technique to hunt for fish and crustaceans.
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A family of Smooth Otters can be spotted frolicking and fishing
in Sungei Buloh Besar.
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A variety of shells can be found embedded in the mud and on the
mangrove trees and other structures. A filter-feeder, the Green
Mussel attaches itself to substrates such as mangrove roots and
man-made structures by means of whitish adhesive threads. The
Brown Mussel burrows itself in the mangrove mud.
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