Dibru-Saikhowa National Park

Listen first. Water moves somewhere close by, slow and heavy, carrying silt down from the mountains. A bird calls from tall grass you cannot see into. The air is damp and warm, and it smells of mud, reeds and river weed. You are standing at the edge of Dibru-Saikhowa National Park, in the far east of Assam, where the land is still being shaped by water every single year.

This park sits in Upper Assam, across parts of the Tinsukia and Dibrugarh districts. It is not a place of hills or cliffs. It is a floodplain, low and flat, wrapped by rivers. The great Brahmaputra and the Lohit run along the north. The smaller Dibru River runs along the south. Between them lies a mosaic of grassland, swamp, sandbars and patches of moist forest. Think of it as an island that keeps changing its shape.

That changing shape is the key to everything here. Each monsoon, the rivers rise and spill across the land. Channels move. Sandbanks appear and vanish. A path that was dry last winter may be under water now. The plants and animals of Dibru-Saikhowa are adapted to this rhythm of flood and retreat. For many of them, the water is not a threat. It is the reason they can live here at all.

The area was protected step by step over several decades. It became a national park in 1999, and it also sits within a wider biosphere reserve. One of the early reasons for protection was a single, shy bird... the white-winged wood duck. This is a large, dark duck with a pale head and white patches on its wings. It lives in quiet forest pools, and it is endangered across its range. Seeing one is rare. Hearing that the whole landscape was valued partly for this duck tells you a lot about how fragile this place is.

Now, here is something most visitors do not expect. Out on the grasslands, you may see horses. Not tame ones — feral horses, living wild in small herds. They are often called the Dibru-Saikhowa horses. The story most often told is that they descend from horses left behind during the Second World War, when this corner of India was a supply route toward Burma. Locals tell the tale with some pride. Whatever their exact origin, these horses have now lived free here for generations, and they are one of the park's most unusual sights.

For most people, the journey into the park begins on the water. Many visitors start near Guijan, on the edge of the reserve, and travel by boat. The engine hums. The banks slide past, lined with grass taller than a person. Herons stand still in the shallows. Then the boat turns into a wider channel, and the sky opens up. On a boat, you move through the park the way the animals see it... from the water's edge.

Keep watching the surface of the river. This is a second surprise. The Gangetic river dolphin lives in these waters. It is almost blind, with a long, thin beak, and it finds its food by sound. You will not see it leap like a sea dolphin. Instead, look for a brief, grey curve breaking the surface, and a soft puff of breath. Then it is gone again. Patience is the only trick that works.

Birds are the real heart of Dibru-Saikhowa. More than three hundred species have been recorded here, which makes it one of the richest birding places in the region. In winter, migrants arrive from colder lands to the north. Ducks gather on the open water. Raptors circle above the grassland. Some of the rarest residents are grassland specialists, such as the Bengal florican and the black-breasted parrotbill. These birds depend on tall, wet grass. As that habitat disappears elsewhere, places like this become their last strongholds.

Larger animals live here too, though they are harder to see. Wild water buffalo graze the wet meadows. Elephants pass through the forest. Tigers and leopards are present, but they are rarely seen, and most visitors never glimpse one. In the forest patches, you might hear primates calling. The truth is simple: the thick grass hides almost everything. You will often see a path through the reeds, or fresh prints in the mud, long before you see the animal that made them.

People live here as well, and that is part of the story. There are villages around the edges of the park, and some communities live on land surrounded by it. Many people in this area belong to the Mishing community, a group with a long tradition of living beside rivers. Their houses are often raised on stilts, to stay dry when the water comes. Fishing, farming and boats are part of daily life. The relationship between these villages and the protected land is complex, and it is still being worked out today.

The park also faces real pressures. Floods and erosion can wash away large areas of land. Oil and gas exploration in Upper Assam has raised concerns among conservationists. Grazing, fishing and human settlement all compete for the same ground. None of this is hidden. When you look across the grass, you are looking at a place that is protected, but not untouched. Its future depends on choices made in the region, year after year.

Take a moment to notice the light. In the early morning, mist often lies low over the water, and the grass turns silver and gold as the sun rises. By midday, the heat flattens the colours, and the animals rest. In the late afternoon, the light softens again, and birds become active once more. The quality of the day changes quickly here. The same channel can feel completely different in two hours.

So stand still, just for a minute. Feel the boat move gently under your feet, or the soft mud at the bank. Listen to the water, the wind in the reeds, the distant calls you cannot name. Dibru-Saikhowa does not show itself all at once. It shows a little at a time, to the people who wait. As you leave, look back at the line of grass along the river... and remember that next year, the water will have drawn it again.