World Tomistoma Day
August 5
About World Tomistoma Day
World Tomistoma Day is observed annually on 5 August. Organised by the Tomistoma Task Force, a specialist group within the IUCN Species Survival Commission Crocodile Specialist Group (CSG), the day raises awareness for the Tomistoma (Tomistoma schlegelii), one of the most endangered and least understood large crocodilians in the world. The date was chosen to honour Ralf Sommerlad, a founding member and former chairman of the Tomistoma Task Force, on his birth anniversary.
What is World Tomistoma Day?
World Tomistoma Day is an annual conservation awareness event focused on the Tomistoma, also known as the false gharial or Malayan gharial. It is observed by zoos, aquariums, conservation organisations, and wildlife enthusiasts to draw attention to this critically threatened crocodilian and the peat swamp forest ecosystems it depends upon. The day provides an opportunity to share scientific information, fundraise for conservation work, and inspire public engagement with one of the world’s most overlooked large reptiles.
The Tomistoma is listed as Endangered on the IUCN Red List of Threatened Species, with a global population estimated at between 2,500 and 10,000 mature individuals. Despite its size, reaching up to five metres in length for adult males, it remains exceptionally secretive and is rarely observed in the wild, making population surveys and conservation efforts particularly challenging.
When is World Tomistoma Day?
World Tomistoma Day falls on 5 August each year. The Tomistoma Task Force has organised the event annually since 2017. The date commemorates the birth of Ralf Sommerlad, a herpetologist and conservationist who was instrumental in establishing the Tomistoma Task Force and advancing knowledge of the species. Sommerlad dedicated significant effort to surveying Tomistoma populations in Borneo, Sumatra, and the Malay Peninsula.
Why Does the Tomistoma Matter?
The Tomistoma occupies a specialised ecological niche in the peat swamp forests and blackwater rivers of South-East Asia. Peat swamp forests are among the most carbon-rich ecosystems on Earth, storing vast quantities of organic matter accumulated over thousands of years. The destruction of these habitats, primarily through drainage for palm oil plantations and logging, releases enormous amounts of carbon dioxide and destroys the habitat on which the Tomistoma depends.
As an apex predator in its habitat, the Tomistoma plays a role in regulating fish and invertebrate populations, contributing to the ecological balance of the peat swamp ecosystem. The loss of apex predators typically triggers cascading changes throughout food webs, affecting the health and diversity of the broader ecosystem.
The Tomistoma also faces direct threats from hunting and incidental capture in fishing nets. Its secretive nature means that many deaths go undetected and unrecorded. The combination of habitat destruction and direct persecution makes it one of the most at-risk crocodilians on Earth, yet it receives far less conservation attention than more charismatic species.
How to Get Involved
The most direct way to support World Tomistoma Day is to follow and share content from the Tomistoma Task Force’s official website and social media channels on 5 August. Many zoos and reptile parks that house Tomistomas, including Crocodiles of the World in the UK, mark the day with special events, educational talks, and fundraising activities.
Donating to organisations working on Tomistoma conservation, peat swamp forest protection, and sustainable land use in South-East Asia is a meaningful way to contribute beyond the day itself. Raising awareness among friends and family about the ecological importance of peat swamp forests, which are under intense pressure from agricultural expansion, is also valuable. Avoiding products that contribute to deforestation, such as unsustainably sourced palm oil, directly reduces pressure on Tomistoma habitat.
History of the Tomistoma
Tomistoma schlegelii was first described scientifically in 1838 by the German naturalist Hermann Schlegel, after whom the species is named. Despite its size and distinctive appearance, with a long, slender snout resembling that of the gharial (Gavialis gangeticus), the Tomistoma remained poorly understood for much of the 19th and 20th centuries. Its secretive behaviour and remote habitat made field surveys difficult, and specimens reached scientific collections only rarely.
For many years, taxonomists debated whether the Tomistoma was more closely related to the true gharial or to the broad-snouted crocodiles and caimans. Molecular studies have since confirmed it belongs to the family Crocodylidae and is most closely related to Gavialis, despite their similar snout morphology representing an example of convergent evolution.
The Tomistoma Task Force was established by the IUCN CSG as a specialist body to coordinate research and conservation efforts for the species. Since its founding, the Task Force has conducted population surveys, supported captive breeding programmes, and worked to engage local communities in conservation. World Tomistoma Day was launched in 2017 as a public-facing element of this work.
Noteworthy Facts
- Adult male Tomistomas can exceed five metres in length, making them one of the largest crocodilians in the world.
- The Tomistoma is also known as the false gharial due to its long, slender snout, which superficially resembles that of the Indian gharial.
- Its range is restricted to Borneo, Sumatra, the Malay Peninsula, and a few areas of Java, all of which have experienced significant habitat loss.
- The species is classified as Endangered on the IUCN Red List, with an estimated population of 2,500 to 10,000 mature individuals.
- Tomistomas are primarily fish eaters but have been documented consuming mammals and birds, and are thought to be more opportunistic than their slender snout suggests.
- World Tomistoma Day has been observed annually since 2017, always on 5 August to mark the birth of conservationist Ralf Sommerlad.
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#WorldTomistomaDay #TomistomaDay #Tomistoma #FalseGharial #CrocodileConservation #WildlifeConservation #EndangeredSpecies
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