Avoiding extinction

Some Asian animals found thriving near humans

Two adult elephants and a baby elephant standing in long grass. A lush green forest is visible behind them.

Image: Adobe

Image: Adobe

Some of Asia’s largest animals, including tigers and elephants, are defying 12,000 years of extinction trends by thriving alongside humans, a University of Queensland-led study has revealed.

Researchers scoured paleontological records to compare the historic distribution of Asia’s 14 largest species with their populations in present-day tropical forests.

PhD candidate Zachary Amir, from UQ’s School of Biological Sciences and the Ecological Cascades Lab, said four species – tigers, Asian elephants, wild boars and clouded leopards – showed increased populations in areas with human infrastructure.

“These results show that, under the right conditions, some large animals can live nearby humans and avoid extinction,” Mr Amir said.

“These results challenge the narrative within some conservation circles that humans and megafauna are incompatible.

A tiger in a forest. It is standing on a brown leaf-coloured ground with tall trees behind it.

Sumatra tiger in the forest. Image: UQ / Matthew Luskin

Sumatra tiger in the forest. Image: UQ / Matthew Luskin

An elephant in Thailand near a residential area. Video: UQ/Matthew Luskin

An elephant in Thailand near a residential area. Video: UQ/Matthew Luskin

“Globally there is a trend towards ‘trophic downgrading’, a term referring to the disproportionate loss of the world’s largest animals," Mr Amir said.

“Trophic downgrading is usually worst near humans because hunters target larger species.

“But in the case of tigers, elephants, wild boars and clouded leopards, their Asian populations are higher nearby humans.

“This may be the outcome of tougher anti-poaching efforts in the national parks that are closer to human settlements and are more frequently visited by tourists.”

The study also found deforestation was still impacting species, and clouded leopard numbers in particular experienced a strong decline in those areas.

But, Mr Amir said the research showed that if the large animal species were not hunted, they could live in relatively small habitats and near humans.

“Previously, there have only been a few examples of large Asian species thriving in small habitats near humans, notably in Mumbai, India where leopards in an urban park prey on stray dogs,” Mr Amir said referring to a prior UQ study.

“Thankfully, we found that a wider range of animals can coexist with humans.”

Image: A Sumatra tiger on the forest edge. UQ/Matthew Luskin

A tiger on a forest-covered mountain. Other tree-covered mountains are visible in the background.

Researchers analysed animals across Asia using hidden cameras, and captured some amazing footage. Video: UQ / Matthew Luskin

At one of their study sites in Singapore, where poaching has been eliminated and there are considerable forest restoration efforts, two large animal species are thriving again.

“Singapore has actually experienced the natural re-wilding of sambar deer and wild boars, which are now frequently observed in an urban forest, the Bukit Timah Nature Reserve,” Mr Amir said.

“If we replicate those protection efforts in larger forests and other counties, we may see positive impacts right around the world.

“But before this can happen, humans need to get our act together and limit poaching.”

While there are some positive results, UQ’s Dr Matthew Luskin said the study also noted strong declines in tapirs, Sumatran rhinoceros, sun bears, gaur and other large animals.

“The key innovation of this work was to systematically investigate the population trends of many different wildlife species across the region,” Dr Luskin said.

“Then we tested if all species showed consistent trends and if similar parks retained similar species.

“Remarkably, we found no two forests currently possess the same group of wildlife compared to thousands of years ago.”

Dr Luskin said the research offered an opportunity to shape the future of nature.

“These results provide hope for wildlife in forests previously considered too far degraded or too close to cities,” he said.

“Now we’re exploring new conservation strategies for these surprising places.”

This research is published in Science Advances.

An elephant on the forest edge. Tall trees are above it and small shrubs and long grass are below it.

Elephant on the forest edge in Borneo. Image: UQ / Zachary Amir

Elephant on the forest edge in Borneo. Image: UQ / Zachary Amir

A rhinoceros in a small pond surrounded by long grass outside a building

Rhino in Nepal near buildings. Image: UQ / Matthew Luskin

Rhino in Nepal near buildings. Image: UQ / Matthew Luskin

Gallery of the 14 Asian animals examined in the study

Drawing of Asian elephant

Asian elephant. Image: Tamz Barber

Asian elephant. Image: Tamz Barber

Drawing of a Banteng

Banteng. Image: Tamz Barber

Banteng. Image: Tamz Barber

Drawing of a bearded pig

Bearded pig. Image: Tamz Barber

Bearded pig. Image: Tamz Barber

Drawing of a clouded leopard

Clouded leopard. Image: Tamz Barber

Clouded leopard. Image: Tamz Barber

Drawing of a dhole

Dhole. Image: Tamz Barber

Dhole. Image: Tamz Barber

Drawing of a Gaur

Gaur. Image: Tamz Barber

Gaur. Image: Tamz Barber

Drawing of a leopard light

Light leopard. Image: Tamz Barber

Light leopard. Image: Tamz Barber

Drawing of a red muntjac

Red muntjac. Image: Tamz Barber

Red muntjac. Image: Tamz Barber

Drawing of a serow

Serow. Image: Tamz Barber

Serow. Image: Tamz Barber

Drawing of a Sumatran rhino

Sumatran rhino. Image: Tamz Barber

Sumatran rhino. Image: Tamz Barber

Drawing of a tapir

Tapir. Image: Tamz Barber

Tapir. Image: Tamz Barber

Drawing of a tiger

Tiger. Image: Tamz Barber

Tiger. Image: Tamz Barber

Drawing of a sun bear

Sun bear. Image: Tamz Barber

Sun bear. Image: Tamz Barber

Drawing of a wild boar

Wild boar. Image: Tamz Barber

Wild boar. Image: Tamz Barber

Item 1 of 14
Drawing of Asian elephant

Asian elephant. Image: Tamz Barber

Asian elephant. Image: Tamz Barber

Drawing of a Banteng

Banteng. Image: Tamz Barber

Banteng. Image: Tamz Barber

Drawing of a bearded pig

Bearded pig. Image: Tamz Barber

Bearded pig. Image: Tamz Barber

Drawing of a clouded leopard

Clouded leopard. Image: Tamz Barber

Clouded leopard. Image: Tamz Barber

Drawing of a dhole

Dhole. Image: Tamz Barber

Dhole. Image: Tamz Barber

Drawing of a Gaur

Gaur. Image: Tamz Barber

Gaur. Image: Tamz Barber

Drawing of a leopard light

Light leopard. Image: Tamz Barber

Light leopard. Image: Tamz Barber

Drawing of a red muntjac

Red muntjac. Image: Tamz Barber

Red muntjac. Image: Tamz Barber

Drawing of a serow

Serow. Image: Tamz Barber

Serow. Image: Tamz Barber

Drawing of a Sumatran rhino

Sumatran rhino. Image: Tamz Barber

Sumatran rhino. Image: Tamz Barber

Drawing of a tapir

Tapir. Image: Tamz Barber

Tapir. Image: Tamz Barber

Drawing of a tiger

Tiger. Image: Tamz Barber

Tiger. Image: Tamz Barber

Drawing of a sun bear

Sun bear. Image: Tamz Barber

Sun bear. Image: Tamz Barber

Drawing of a wild boar

Wild boar. Image: Tamz Barber

Wild boar. Image: Tamz Barber

Media: Dr Matthew Luskin, m.luskin@uq.edu.au, +61 (0)412 915 923; Zachary Amir, z.amir@uq.edu.au, +61 (0)417 490 560; Faculty of Science Media, science.media@uq.edu.au, +61 (0)438 162 687.