The Bangka slow loris is listed as Critically Endangered by the International Union for Conservation of Nature (IUCN, 2015) appearing on the IUCN’s Red List of Threatened Species. It was last seen in 1937. The species may already be extinct. More surveys are needed to find this species.

A combination of historic forest loss and continued degradation has resulted in less than 20% of former suitable remaining habitat. Species distribution modelling and a gap analysis have revealed that any remaining subpopulations would be highly fragmented. Due to mass conversion of the island of Bangka for oil palm over the last 20 years, the species is suspected to have experienced a decline of at least 80% over the last 24 years (three generations).

Misunderstanding the taxonomy of slow loris species has proven problematic for their conservation both generally and locally. While researchers wrestle with the raw data, conservationists may occasionally misidentify the individual slow lorises that wind up in their care. Since taxonomy determines what they should be fed, how they should be socialized, and where they should be released if they are eventually rehabilitated, proper care and rehabilitation is dependent on proper species identification.

This issue of taxonomy is doubly important given the sheer number of slow lorises that end up in rescue and rehabilitation centers. The biggest threat to all slow loris species is their value as commodities in the exotic pet trade and for traditional medicines. Slow lorises are illegally trafficked and sold all over the world. Buyers rarely have any concern about what variety of slow loris they are receiving. When rescued from these circumstances, a slow loris is inevitably already in rough shape. Suffering from infection, malnutrition, and blindness, and highly stressed by his ordeal, there is no room for error in getting him what he needs as fast as possible. Therefore, proper rapid identification is essential to his rescuers’ success.

Unfortunately, poached from the wild, a slow loris’s chances of survival are small—and rehabilitation leading to her release even smaller. Even if she is brought back to optimal health, a single consequence of her ordeal remains that will permanently prevent her eventual release. When she was first taken, her captors prepared her for sale. By removing her teeth—an incredibly painful procedure typically done without any kind of anesthetic—they prevent her from biting their future owners and injecting them with her venom, which can prove fatal. However, with this one action, she, a competent and self-reliant creature, is rendered helpless and dependent for the rest of her life. For without her teeth, she cannot eat and she cannot defend herself. Ultimately, she has no hope of ever rejoining the wild.

While life in the wild is certainly preferable to life in captivity, slow lorises who avoid becoming pets are still threatened by human encroachment into their natural habitats. When left to their own devices, slow lorises often prove to be quite adaptable and capable of surviving in suboptimal conditions. In many places where they live, however, forests have been degraded to the point where it significantly and adversely effects their rates of survival—and fragmentation of their ranges inevitably inhibits healthy gene flow between spatial groups. What’s more, such trends put them at even greater risk of being found, captured, and sold into the pet trade.

Some populations of Bangka slow lorises, if they still exist, likely live in one of the last and largest stretches of continuous ancient forest left in Southeast Asia. Known as the Heart of Borneo, this vast stretch of forest is less than half of what the island once supported. In the last thirty years alone, illegal logging, the construction of dams and other infrastructure, mining, slash-and-burn agriculture, and many other human activities have drastically depleted Borneo’s wilderness, putting the animals that call it home—including many humans themselves—at great risk.

The Heart of Borneo, for now, remains intact. But these trends have not let up. Compounded with the overarching effects of climate change, the future for the Bangka slow loris’s home appears bleak. Slash-and-burn agriculture has become especially problematic over the years. With its peat forests and swamps, Borneo is highly vulnerable to fire. When a fire ignites in one of these environments it can smolder invisibly underground for weeks. In the wake of such fires, the scorched soil more easily erodes, preventing the forests from ever recovering. September 2019 saw some of the worst fires on record, many of which had been set intentionally in order to clear the land for palm oil plantations. So long as the Heart of Borneo is at risk, so too is the Bangka slow loris.

On Bangka Island, the Bangka slow loris faces habitat destruction due to mining projects for tin and iron used in smartphones and other electronic goods.

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