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Unknown Animals

Orang Pendek: the cryptid biologists take seriously

A small upright primate reported in the forests of Sumatra, by local people for centuries and by field biologists since 1989. It is the one case where the professional response has been to go and look.

ATS Field DeskSites and witnesses
2 min read
Dense rainforest canopy

Reports centre on the Kerinci Seblat National Park in western Sumatra, an area of some 13,000 square kilometres.

Orang pendek means "short person" in Indonesian. It is described as a primate about a metre to a metre and a half tall, walking upright, powerfully built, covered in short dark hair, moving on the ground rather than through the canopy.

Of everything in this cluster, it is the claim with the best standing among working biologists — and understanding why says a great deal about what makes a cryptid claim reasonable.

What is documented

Illustration

Reports from local communities in western Sumatra going back generations, and from Dutch colonial administrators and naturalists from the nineteenth century onward.

From 1989 the conservationist Debbie Martyr and the photographer Jeremy Holden ran a long-term project in Kerinci Seblat National Park, initially for tiger conservation, which included systematic collection of orang pendek reports and attempts to obtain evidence. Martyr reported sightings herself.

Footprint casts have been made. Hair samples have been collected and submitted for analysis.

Why it is nevertheless the strongest case

Four reasons, and each is about the setting rather than the sightings.

The habitat is right. Sumatran rainforest is dense, extensive, difficult, and genuinely under-surveyed. Large mammals there are hard to find even when their existence is not in doubt.

The animal described is plausible. A metre-tall forest primate is not an extraordinary thing for Sumatra to contain. The island already has orangutans, gibbons and several macaque species.

The precedent is strong. Sumatra has produced genuinely new large-mammal discoveries in living memory, and Indonesia produced Homo floresiensis in 2003 — a small-bodied hominin on Flores, unknown until excavation found it, which nobody had predicted.

And the witnesses include field biologists with relevant training, reporting through their own institutions rather than to the press.

The most likely explanations

A known animal, misjudged. A sun bear standing upright is roughly the right height, is dark, and is powerfully built. Local people distinguish them, but a bear at distance in poor light accounts for many reports.

An unrecognised primate, which is possible and unproven.

Or a genuine folk tradition that predates and shapes the sightings, as such traditions reliably do.

Join the discussion

Still open on this one:

  1. 01

    Why have thirty-five years of camera traps produced nothing?

    The strongest objection in the case. Tiger monitoring has saturated the area with cameras, and a ground-dwelling primate should appear in that data.

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Sources

Open them and check for yourself. Where a record is public, it is linked.

  1. The IUCN Red List of Threatened Species

    International Union for Conservation of Nature

  2. Natural History Museum collections

    Natural History Museum, London

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