Ormosia calavensis is a widespread species occurring in the Philippines, Indonesia, Malaysia, Papua New Guinea, Palau, and Solomon Islands. This species naturally thrives in low and medium elevation primary and secondary forests in the Philippines, along rivers in Indonesia, primary montane forest in Malaysia, hill forest and lowland disturbed rainforest in Papua New Guinea, ravine forest in Melekeok, Palau, and secondary forest of Western, Solomon Islands at elevations up to 1,829 m above sea level. It has a calculated extent of occurrence (EOO) of 11,935,729.194 km². Though the population size is currently not known, a continuous decline is expected due to habitat-threatening effects of commodity-driven deforestation, logging activities, shifting agriculture, and urbanization. However, despite of these threats affecting the population and natural habitat quality, it is assessed globally as Least Concern (LC) given its numerous occurrences, very wide distribution, and expected abundance.

Ormosia calavensis is native to the Philippines, Indonesia, Malaysia, Papua New Guinea, Palau, and Solomon Islands. The species is found in low and medium elevation primary and secondary forests of Agusan del Norte, Albay, Aurora, Batangas, Basilan, Bataan, Batanes, Bulacan, Cagayan, Camarines, Cavite, Cebu, Davao del Sur, Ifugao, Isabela, Laguna, Lanao del Sur, Leyte, Marinduque, Masbate, Oriental Mindoro, Misamis Occidental, Negros Occidental, Negros Oriental, Nueva Ecija, Palawan, Quezon, Rizal, Romblon, Samar, Sorsogon, Surigao del Norte and Zamboanga, Philippines as well as along river of Nusa Tenggara Timur, Jawa Tengah, Kalimantan Timur, Maluku, Maluku Utara, Papua, Papua Barat, Sulawesi Selatan, and Sulawesi Utara, Indonesia. It can also be found in primary montane forest of Pulau Pinang, Sabah, Sarawak, and Trengganu (Besut), Malaysia and in hill forest and lowland disturbed rainforest of Central, Milne Bay, Morobe, Sandaun, Southern Highlands, Western Province, Papua New Guinea. Specimens were also collected in ravine forest of Melekeok, Palau and secondary forest of Western, Solomon Islands. It usually grows at an elevation of one to 1,829 m above sea level (Merrill 1923, Pro-Seeds Development Association, Inc. 2019, GBIF 2022). It has an extent of occurrence (EOO) of 11,935,729.194 km².

In 2019, 32 individuals of Ormosia calavensis were recorded by Pro-Seeds Development Association, Inc. – 20 in Maragondon, Cavite, seven in Camalaniugan, Cagayan, two in Narra, Palawan and Leyte, and one in Mt. Mingan, Gabaldon, Nueva Ecija. The total population size of this widespread species, however, remains uncertain due to lack of research initiatives – which can be addressed by further inventory and documentation. It is expected that there is continuous population decline due to continuing forest losses within its range induced by commodity-driven deforestation, logging activities, shifting agriculture, and urbanization (GFW 2022).

Ormosia calavensis is a small to large tree species with height ranging from six to 35 m. It can be naturally found in low and medium elevation primary and secondary forests in the Philippines, along river in Indonesia, primary montane forest in Malaysia, hill forest and lowland disturbed rainforest in Papua New Guinea, ravine forest in Melekeok, Palau, and secondary forest of Western, Solomon Islands at an elevation of one to 1,829 m above sea level (Merrill 1923, GBIF 2022). There is no information on the phenology of the species.

Ormosia calavensis is primarily threatened by land conversion and habitat degradation caused by commodity-driven deforestation, logging activities, shifting agriculture, and urbanization. A significant loss of tree cover (9.31 Mha) from 2001 to 2020 is reported across the range of the species based on analyzed data from GFW (2022).

The leaf extract Ormosia calavensis is an effective anti-inflammatory substitute while the wood extract was found to have antibacterial activity (Pedong and Getalado 2019). It is also a voucher specimen for anticancer and anti-AIDS screening and used as firewood (GBIF 2022).

The species is not included in the Philippine Red List (DENR-BMB 2017). However, the population of the species is protected in situ because of its presence in declared protected areas (PAs) such as Upper Marikina River Basin Protected Landscape, Mt. Guiting-Guiting Natural Park, Lake Danao Natural Park, Central Cebu Protected Landscape, Lake Lanao Watershed Reservation,Mt. Apo Natural Park, Siargao Island Protected Landscape and Seascape, Peñablanca Protected Landscape and Seascape, and Batanes Protected Landscape & Seascape in the Philippines as well as Lake Kutubu in Papua New Guinea. It is also recorded in key biodiversity areas (KBAs) in the Philippines such as Buguey wetlands, Aurora Memorial National Park, Mount Dingalan, Balogo watershed, Pagbilao and Tayabas Bay, and Victoria and Anepahan Ranges. In addition, it is known in at least five botanic gardens globally (BGCI 2022). Further inventory and research are needed to account for total remaining population size in the wild.