Dibru-Saikhowa

Dibru-Saikhowa National Park protects unique floodplain ecosystems in eastern Assam, India, at the confluence of the Brahmaputra and Dibru Rivers. Established as a national park in 1999, it covers approximately 340 square kilometers of wetlands, grasslands, and semi-evergreen forests that flood seasonally. The park is famous for its feral horse population, descended from domestic horses abandoned during an earthquake in 1950. The wetlands attract enormous congregations of migratory waterfowl including rare species like the greater adjutant stork.

The park is home to an impressive variety of wildlife, including 36 mammal species, 382 bird species, and numerous reptiles and amphibians. Key mammals include feral horses, hoolock gibbons, elephants, tigers, and dolphins. It's particularly famous for its avifauna, hosting many endangered birds like the Bengal Florican, White-winged Duck, and Greater Adjutant Stork. The park also supports significant populations of water birds and is a crucial stopover for migratory species. The Gangetic dolphin can be spotted in the park's river systems.

Dibru-Saikhowa hosts a diverse array of vegetation types, including semi-evergreen forests, moist mixed deciduous forests, and extensive grasslands. The park features over 680 species of plants, including rare medicinal herbs and orchids. Notable species include Hollong (Dipterocarpus macrocarpus), Terminalia myriocarpa, and various bamboo species. The grasslands are dominated by tall elephant grass (Imperata cylindrica) and reed brakes. Several threatened plant species find refuge here, making it a significant botanical preserve.

The park is situated in the Brahmaputra Valley floodplains, characterized by alluvial soil formations and numerous river islands (chapories). The landscape was shaped by the mighty Brahmaputra and its tributaries, creating a complex network of water bodies and wetlands. The terrain consists of semi-permanent sandbars, grasslands, and elevated regions that remain above water during floods. The soil is primarily composed of fine alluvial deposits, making it highly fertile but also susceptible to erosion.

Dibru-Saikhowa experiences a subtropical monsoon climate with distinct seasons. Summers (March-May) are warm and humid with temperatures reaching 35°C, while winters (November-February) are mild with temperatures ranging from 7-20°C. The park receives heavy rainfall during the monsoon season (June-September), averaging 2,300-3,800mm annually. The best time to visit is between November and April when the weather is pleasant and wildlife viewing conditions are optimal. Flooding is common during monsoons, which can limit park access.

Dibru-Saikhowa was initially declared a wildlife sanctuary in 1986 and later elevated to National Park status in 1999. The park's name derives from 'Dibru' meaning a blister, referring to a river branch, and 'Saikhowa' meaning the golden-red color of soil. Historically, the area served as a refuge during the 1950 Assam earthquake and has been home to various indigenous communities. The park's formation was crucial for protecting its unique semi-evergreen forests and wetland ecosystems that were under threat from human activities and natural disasters.

Dibru-Saikhowa's protection began in 1986 when it was declared a wildlife sanctuary, elevated to national park status in 1999 in recognition of its exceptional biodiversity. The area has historically been used by local communities for fishing, grazing, and collection of wetland resources. Conservation interest grew following scientific surveys in the 1980s that documented the area's importance for endangered species and migratory birds. A major oil spill in 2020 severely impacted park ecosystems.

The park's most distinctive features include its unique feral horse population, one of the last remaining in India, and its extensive network of river islands. The Maguri-Motapung Beel, a wetland adjacent to the park, is renowned for bird watching. The park's semi-evergreen forests represent one of the last remaining patches of such habitat in the region. The confluence of the Brahmaputra and Lohit rivers creates a spectacular landscape, while the numerous chapories (river islands) provide essential habitats for wildlife. The park also serves as an important elephant corridor and is recognized as an Important Bird Area (IBA).

Access to Dibru-Saikhowa National Park is from Tinsukia town (13 km), which has rail connections. The nearest airport is Mohanbari (40 km). Access within the park is primarily by boat given the extensive wetlands and seasonal flooding. The best entry point is Guijan village. The park offers boat safaris through waterways. The best visiting season is November to April during the dry season when water levels are lower and migratory birds are present.

Conservation at Dibru-Saikhowa focuses on protecting threatened wetland species including wild water buffalo and white-winged wood ducks. The park implements grazing management to prevent overgrazing. Invasive species control targets water hyacinth that degrades wetland habitats. The 2020 oil spill required emergency response including wildlife rescue and cleanup operations. The park works to mitigate human-wildlife conflict, particularly crop raiding by elephants.