So far, more than 80 species of birds have been recorded at KKW. 
Most of the birds you will see here are the waterbirds like egrets & herons. There are 6 types of egrets, but the most common egrets you can see here are the Little Egret, Intermediate Egret and the Great Egret. You can see them walking on the mud during low tides and during high tide, they will perch on the rail.
Other than waterbirds, there are also some canopy birds such as kingfisher, pigeons, dove, starling and lots more. We also have birds that come from places as far as Siberia and Northern China. Those are the migratory birds. If you come here between the month of October and April, you can see the Common Sandpiper, Greenshank, Redshank, Plover and many more. It is important to conserve this sanctuary, as it is one of the migration paths so that the birds can stop to feed along the way.
There are many other fauna live in the mangrove mud, which is actually very rich in food of all types. Tilapia is an abundant fresh water fish that also lives in brackish water. During low tide, if you see some deep round pool, those pools were made by the male tilapia for courting and shelter when the tide water goes out.
Another fish that can be found is the mudskipper. It is a strange looking fish that does not look like a fish. It can live on the land. You will see it skipping on the mud and water. It even can walk around by pushing on its fins. You can see it resting on the roots of the mangrove plants during high tide.
The best time to see crabs is during low tide. They come out from their burrows when the tide recedes. That is the time you can listen to the ‘pop’ sounds. Fiddler crab is the small but colourful crab. The male Fiddler Crab waves its one large claw outside the burrow to defend its territory and also to attract females that have normal size claws. Different Fiddler Crab species have different colors.
Another type of crab is the mud crab that can be eaten. Those crabs are larger and much harder to see as they look very much like mangrove mud.
The mud lobster is very shy and secretive, that only comes out at night or on very cloudy days. You also might able to spot the Horseshoe crab in the water. Horseshoe crab is an ancient animal that always travels in pairs. You will also find lots of seashells such as mudwhelks, oyster and mussels.