Best Borneo

The Heart of Borneo is a transboundary conservation agreement spanning approximately 220,000 square kilometers of equatorial rainforest on the island of Borneo. Initiated by the World Wildlife Fund (WWF), the agreement was formally signed by the governments of Brunei, Indonesia, and Malaysia in 2007...

The Rajah Brooke’s Birdwing is a large butterfly native to Borneo. It's notable for its striking black and red coloration, making it one of Southeast Asia’s largest butterflies. Belonging to the Papilionidae family, this species is primarily observed by lepidopterists and those interested in Bornean...

The Sarawak Chamber resides within a complex karst system in Gunung Mulu National Park, Malaysia. This immense cave passage is recognized as the largest known underground chamber globally, measuring approximately 80 meters high and 237 meters wide. Its colossal scale makes it a significant geologica...

Gunung Mulu Karst is a vast limestone karst region located within Gunung Mulu National Park in Borneo, Malaysia. It’s notable for its extensive cave systems, including the Sarawak Chamber – the world's largest known underground chamber. The area contains significant geological formations and biodive...

Kayan Mentarang National Park is a vast protected area in North Kalimantan, Indonesia, situated in the highlands of Borneo. Covering over 1.3 million hectares, it preserves one of the largest remaining blocks of tropical rainforest in Southeast Asia. The park is a biodiversity hotspot and is co-mana...

The Mahakam Delta is an extensive estuarine system located on the eastern coast of Borneo in East Kalimantan, Indonesia. It is formed where the Mahakam River meets the Makassar Strait, creating a landscape historically dominated by dense mangrove forests and brackish lakes. The delta serves as a cri...

Kutai National Park is a protected area in East Kalimantan, Indonesian Borneo, established in 1982. It preserves lowland tropical rainforest and is one of the few remaining orangutan habitats in Kalimantan. The park also shelters proboscis monkeys, Bornean clouded leopards, and sun bears. Kutai has...

The Rajang Delta is an expansive alluvial delta located in Sarawak, Malaysia, on the island of Borneo, formed by the sediment deposits of the Rajang River. It is characterized by a specialized ecosystem dominated by extensive peat swamp and mangrove forests that support diverse regional wildlife. In...

Koschevnikov's Honey Bee (Apis koschevnikovi) is a eusocial cavity-nesting bee belonging to the family Apidae. Described by Günther Enderlein in 1906, it was named in honor of Russian entomologist Grigory Koschevnikov. The species is endemic to the tropical evergreen forests of Borneo and Sumatra. I...

Apis koschevnikovi, commonly known as Koschevnikov's honey bee, is a species of honey bee native to the tropical forests of Borneo and Sumatra. It is distinguished by its unique reproductive behavior, conducting mating flights at specific times of the afternoon to avoid crossbreeding with the sympat...

The Kinabatangan River is the longest river in Sabah, Malaysian Borneo, flowing from the island's interior to the Sulu Sea. Its lower floodplain contains wetlands, oxbow lakes, mangroves, and fragments of lowland rainforest that support orangutans, proboscis monkeys, pygmy elephants, hornbills, and...

Apis nuluensis is a cavity-nesting honey bee associated with the montane forests of Borneo, particularly the highlands of Sabah in Malaysia. It was formally described in 1996 after being distinguished from the closely related eastern honey bee, Apis cerana, with which it can occur in the same region...

Rhacophorus dulitensis is a species of tree frog in the family Rhacophoridae that is native to Borneo. The species was described from Mount Dulit in Sarawak and is associated with forest habitats, including montane areas. Like other members of its genus, it has expanded webbing suited to life in veg...

The Kapuas River is a major waterway located entirely within the province of West Kalimantan on the Indonesian portion of the island of Borneo. Measuring approximately 1,143 kilometers in length, it is the longest river on the island and the longest in Indonesia. The river flows westward from the Ka...

Bay in East Kalimantan, Indonesia, site of significant World War II amphibious battles in 1942 and 1945 as Allied and Japanese forces contested control of its petroleum infrastructure.

The Rajang River is the longest river in Malaysia's Sarawak state on Borneo, notable for its deep interior navigation routes and housing the massive Bakun Dam completed in 2011.

The Borneo shark is a tiny requiem shark from inshore Borneo waters, notable for its extreme rarity and 1858 description by Pieter Bleeker.

The Mahakam River is the largest river in East Kalimantan, Indonesia, notable for flowing through the Mahakam lakes region and serving as a critical habitat for endangered dolphins.

The Kingdom of Sarawak was the Brooke family's state in northwestern Borneo, founded by James Brooke in 1841 and ceded to Britain in 1946.

The Barito River is a large river in South Kalimantan, Indonesia, notable for flowing through the city of Banjarmasin and supporting extensive peat swamp forests in its delta.

The Sultanate of Brunei is a sovereign absolute monarchy on the island of Borneo, notable for its historical peak in the 15th century and modern vast oil wealth.