OCT 29, 2018 7:20 AM PDT

Elephants Compress Small Food Bits With Their Trunks Before Picking it Up

WRITTEN BY: Anthony Bouchard

It’s no mystery that elephants use their versatile trunks to grab food and stuff it in their mouths; this behavior is frequently seen in nature as the creatures reach into trees to grab branches or leaves, but not all types of food can be picked up with the tried and true ‘grab’ technique.

Image Credit: Atlanta Zoo

A team of curious researchers from Atlanta Zoo, the Georgia Institute of Technology, and the Rochester Institute of Technology wanted to learn more, so they filmed an adult elephant at Atlanta Zoo as they fed it different types of food comprised of various shapes and sizes. Their findings have been published in the Journal of the Royal Society Interface.

The researchers’ elephant-centric smorgasbord encompassed a variety of items, including carrots and rutabagas sliced to various sizes. But perhaps the most captivating thing on the menu was the bran, which sports a near-powder consistency.

Astonishingly, upon feeding the differently-sized foodstuffs to the elephant, it formed a ‘joint’ with its trunk and compressed the smaller food bits into solid masses that could be more easily picked up with the trunk and consumed.

"It seems counterintuitive that you put more weight on something that you're trying to pick up, but the reason that makes sense is that when you push down on this food, because it's particulate, it forces all the food to squeeze together even more," elucidated study co-author Scott Franklin, a scientist at RIT.

"The more tightly the food is squeezed together, the more likely the friction between them will be enough to allow you to pick it up."

Related: Scientists expose East African elephant poaching patterns

The researchers placed the food on a force plate before feeding it to the elephant, which allowed the researchers to discern how much force was necessary for the compression. They found that the joint shape in the trunk differed depending on the force exerted by the elephant; the more force there was, the longer the joint, perhaps for additional leverage.

The findings are important not just for understanding elephants, but also for learning more about the mechanisms behind these techniques such that we can replicate them in robotic applications for real-world use.

"It is very difficult to develop a gripper that is flexible enough to pick up a variety of objects, for example, a single pen or a pile of pens, or a cube of Jell-O," Franklin added.

"The elephant trunk is a single thing; it doesn't change shape at all, but it is able to pick up food of different sizes, weights, and masses, so the idea is that this will give us insight and information into how nature has solved this problem of how to pick up multiple things and then we can try to reproduce it."

Related: They say an elephant never forgets...

It’s certainly fascinating to have learned how elephants pick up near-powder-like substances, but it should be even more interesting to observe how this research inspires future advancements in technology.

Source: Rochester Institute of Technology,

About the Author
  • Fascinated by scientific discoveries and media, Anthony found his way here at LabRoots, where he would be able to dabble in the two. Anthony is a technology junkie that has vast experience in computer systems and automobile mechanics, as opposite as those sound.
You May Also Like
DEC 03, 2019
Plants & Animals
DEC 03, 2019
Florida's Manatees Are a Conservation Success Story
Manatees are be a common sight for Floridians who reside close to rivers and other natural waterways, but there was once a time when that wasn’t the...
DEC 08, 2019
Plants & Animals
DEC 08, 2019
Female Baboons Avoid Mating When STDs Are Involved
In the animal kingdom, wild creatures are quite literally hard-wired to locate suitable mates and work as quickly as possible to ensure reproductive succes...
DEC 09, 2019
DEC 09, 2019
Russian Cows Use VR Headsets to Increase Milk Production
Harsh weather conditions, particularly those found during winter months, are known to lead to a decrease in milk production among cows. To tackle this, Rus...
DEC 27, 2019
Health & Medicine
DEC 27, 2019
What Does the National Academy of Sciences, Engineering, and Medicine Say About Cannabis?
A recent article in the Chicago Tribune explains that Dr. Steven Aks, director of toxicology at Stroger Hospital in Chicago, is foreseeing a surge in what...
DEC 30, 2019
Plants & Animals
DEC 30, 2019
Are Blue Animals Truly Blue?
Animals come in all sorts of colors, and while the animal kingdom has most of the rainbow’s colors at its disposal, there are a few exceptions. Some...
JAN 09, 2020
Earth & The Environment
JAN 09, 2020
Australian Bushfire Update
Devastating wildfires continue to ravage the continent of Australia. The report from BBC News below, which aired earlier this week, gives an encompassing u...
Loading Comments...