Bishan Riverside Walk Planner: Otters on a Rewilded River

Bishan-Ang Mo Kio Park is one of the most loved green spaces in Singapore's heartland, and the river that runs through it has a remarkable story. What is now a winding, grassy-banked stream full of fish and birds was once a straight concrete drain. This riverside walk plan is for wildlife lovers and early risers. Arrive at first light, walk slowly along the banks and give yourself the best chance of meeting the families of otters that have made this river their home.

For a long time the water here was hidden in a hard-edged canal, fenced off and built only to move rain away as fast as possible. Then the city decided to try something bolder. The concrete was broken out and the channel was reshaped into a meandering river with soft banks, plants, rocks and shallow pools. It was designed so that people could walk right down to the water instead of looking at it through a fence.

The result changed the park completely. Birds, insects, fish and eventually otters moved in, and residents began to treat the river as a place to visit rather than a drain to ignore. Walking here, it is easy to forget that the landscape is engineered, because it looks and sounds like a natural stream. Knowing the story makes the walk richer, since every reed and pebble is part of a deliberate experiment that worked.

Wildlife is most active at dawn, and the park is at its quietest. The air is cool, joggers are only just appearing and the water is often calm and misty. Otters tend to be busy in the early morning, swimming, fishing and grooming on the banks, and birds such as kingfishers and herons are hunting along the edges. Later in the day the heat and the crowds make sightings less likely.

Plan to arrive as the sky starts to lighten and give yourself at least an hour. Walk slowly and stop often. The best wildlife moments here come to people who are patient, who stand still on a bridge for a few minutes and who listen as much as they look. Rushing along the main path to cover the whole park is the surest way to see nothing at all. Many regulars pick one favourite bend and return to it every week.

The otters here are wild, even though they live in the middle of a busy town, and they deserve space. Keep a good distance, never try to feed or touch them and do not block their path when they cross the grass or the footpath. If they come close, stay calm and still and let them pass. Keep dogs on a short lead and away from the water when otters are around.

Photographers should use a zoom rather than moving closer, and avoid flash. Speak quietly, and if a crowd gathers, step back so the animals do not feel trapped. Many regular walkers here act as gentle guardians of the otters, and you will often see people politely reminding visitors to give them room. Following their lead is the best way to enjoy the encounter and keep the river a safe home.

Even if the otters stay hidden, the river rewards attention. Look for the flash of blue as a kingfisher dives, the slow stalk of a heron in the shallows and the bright colours of sunbirds feeding on flowers along the banks. Small bridges and stepping stones cross the water at intervals, and each one gives you a new vantage point over a different bend of the river.

There are quieter corners of the park away from the main paths, with shady trees, open lawns and small ponds. These are lovely places to sit for a while and simply watch. Bring a small pair of binoculars if you have them, and perhaps a notebook to jot down what you see. Children especially enjoy keeping a list and comparing it on the walk home.

One of the clever features of this river is how it handles storms. The wide, grassy floodplain on either side is designed to fill with water during heavy rain and then drain away again. If you visit the morning after a big downpour, you may see the river running higher and faster and the banks freshly washed. It is a fascinating reminder that the park is also a working piece of the city's water system.

Never walk on the lower banks during or just after a storm, since the water can rise quickly and the grass can be slippery. Stay on the higher paths and watch from the bridges. When conditions are calm again, the river settles back into its gentle course, and the birds and otters return to their usual haunts along the banks. Puddles on the paths are a good excuse for children in wellies, but the river itself is best admired from above.

This walk suits nature lovers, keen photographers, families with curious children and anyone who wants to see a different side of Singapore from the city centre. It is especially good for residents of the surrounding estates who want a peaceful morning routine. The main paths are flat and well paved, so it works for prams and wheelchairs, although some of the paths near the water are uneven.

It is not the walk for those looking for cafés on every corner or a busy waterfront scene. The pleasures here are quiet and depend on patience. If you would rather have skyline views and city buzz, choose one of the quays in the city centre. If you would like a slow, green morning with a real chance of meeting wild animals, this river is a gift.

When your walk is done, the surrounding neighbourhoods have plenty of hawker centres and coffee shops where you can sit down with a kopi and a plate of something warm. Open the Karpo APP as you leave the park to find a breakfast spot close to whichever gate you used, and save the ones you like for next time. It saves wandering around hungry after an early start.

Wear comfortable shoes, light clothing and insect repellent, and bring water. A hat helps if you stay out after the sun gets high. The park is large and has several entrances, so pick a gate near public transport and plan a loop that brings you back to it. Above all, go slowly. On this river, the walkers who take their time are the ones who go home with a story about the otters.