If an elephant tears the leafy end off a branch because the branch is too bushy to swat flies properly, and then swats the flies, has it just made a tool?
That question is smaller than it sounds and stranger than it looks. It sits right at the edge of what we mean when we say an animal is cognitively sophisticated, and a study from Nagarhole National Park in southern India put a version of it to the test.
The short answer, according to the researchers, is yes. The longer answer is where it gets interesting.
What counts as a tool, and does swatting flies qualify?
Tool use and tool manufacture are treated as two different things in animal behaviour, and the gap between them matters.
Definitions of animal tool use generally centre on an animal deliberately controlling an external object to alter something in its environment, its own body or another organism. Picking up a stick and using it is one thing. Altering an object first, so that it works better for the job you have in mind, is considered a further step.
The classic reference point is Jane Goodall’s 1960 observation of chimpanzees stripping the leaves off twigs to fish termites out of a mound. That stripping step, the modification before use, is the part that made the finding famous.
So swatting a fly with a branch you happened to pick up is tool use. Trimming that branch down to a usable size first is tool manufacture. The Nagarhole study set out to document both in the same species.
What the wild elephants in Nagarhole did
In the first part of the study, published in 2001 in Animal Behaviour by Benjamin Hart, Lynette Hart, Michael McCoy and C. R. Sarath, the team watched wild elephants in and around the park. Over 26.7 cumulative hours they observed one juvenile and 33 adults. “Eight of these elephants were observed using branches presumably to repel flies,” the authors report.
Note the word “presumably.” The team is describing what they saw and offering the most likely reading of it, not claiming to have proven the elephant’s intent. That hedge is easy to skim past, but it’s important. An elephant waving a branch near its body is consistent with fly control; it isn’t a signed confession.
The behaviour itself wasn’t new to science. An earlier study by Benjamin and Lynette Hart, published in 1994, had examined working Asian elephants in Nepal and measured what switching actually does. In an experiment with eight elephants during the period when flies were most active, giving the animals branches reduced the median fly count by 43 percent. The same paper noted that Darwin had alluded to elephants doing this more than a century before.
So the wild observations confirmed a known trick. The second part of the 2001 study is what pushed things further.
The captive-setting test: when the branch was wrong, they fixed it
To test for manufacture rather than plain use, you have to hand an animal an object that doesn’t work and see whether it improves the object before using it. That is essentially what the team did with 13 elephants kept under what the researchers called a “naturalistic system”. They handed over branches deliberately made too long or too bushy to work well as switches.
The setup was tightly specified. “The long branches were presented in two trials to each elephant and they were given 5 min to either attempt switching with the long branch, or modify the branch and switch with the altered branch,” the authors write. Eight of the 13 modified a branch on at least one trial and then switched with the altered version.
How they did it is oddly specific. “There were different styles of modification of the branches, the most common of which was holding the main stem with the front foot and pulling off a side branch or distal end with the trunk,” the paper records. Foot to pin, trunk to tear. A two-part operation aimed at producing a more usable switch.
Why modifying a branch is the part that raises eyebrows
Picking a tool off the ground can be explained without assuming very elaborate planning. Reshaping one raises a harder question. To shorten a branch that is too long, the animal has to respond to the mismatch between the object it has and the object that works for the task, then alter it accordingly.
That is why tool manufacture is treated separately from simple tool use in the animal-cognition literature. But exactly how much foresight or mental representation is required remains open to interpretation.
The authors don’t undersell what they think their result means. Their conclusion is that documenting tool manufacture in elephants, alongside what they describe as an unusually large volume of cerebral cortex available for cognitive processing, “would appear to place this animal in the category of great apes in terms of cognitive abilities for tool use and tool manufacture.”
Keep in mind that this is a single 2001 study. Our read is that the manufacture observation is the solid, checkable finding. The great-ape comparison is the authors’ interpretation of what it implies, and it should be read as an argument, not a verdict.
Where this sits among other animal tool-users
Elephants are unusual tool candidates partly because of the trunk. It is not just a grasping organ but a major sensory organ, and holding a stick in it can interfere with the elephant’s ability to investigate the thing it is trying to reach. That matters because researchers have argued that some earlier failures to demonstrate elephant problem-solving may have resulted from tasks requiring trunk-held sticks, effectively tying up the animal’s main tool for sensing and locating the food.
Give an elephant a different route and the picture changes. In a 2011 study, researchers describe how, “without prior trial and error behavior, a 7-year-old male Asian elephant showed spontaneous problem solving by moving a large plastic cube, on which he then stood, to acquire the food.”
That was one animal, Kandula. In further trials, he retrieved the cube from different locations, generalized the technique to other objects and even tried stacking smaller objects when the cube was unavailable. The researchers concluded that his behaviour was consistent with insightful problem solving, while acknowledging the difficulty of deciding exactly what should count as “insight.”
Put the two studies together and you get a consistent, careful picture rather than a triumphant one. Elephants use branches to deal with flies. Some of them will fix a branch that isn’t up to the job before they use it. Whether that reflects genuine foresight, an elephant picturing the switch it wants and working toward it, or something more automatic honed by long experience with vegetation, is a question the fixed branch can’t fully answer on its own.
What we can say is that the animal handed a wrong tool didn’t just give up or make do. It changed the tool to fit the task, and then got on with swatting.