Surprisingly, the most curious animal on earth (human beings) have researched this issue thoroughly.
ShutterstockIt used to be thought that squirrels just absent-mindedly buried nuts in the hopes of sniffing some out in the future - whether they were the ones they buried or not."Squirrels have been criticized for hiding nuts in various places for future use and then forgetting the places. Well, squirrels do not bother with minor details like that. They have other things on their mind, such as hiding more nuts where they can't find them," wrote cheeky W. Cuppy in his 1949 volume "How To Attract A Wombat," 40 years before Lucia F. Jacobs and Emily R. Liman conducted the study that would un-sully the reputation of grey squirrels.ShutterstockBut research conducted at Princeton University's biology department at the tail end of the 20th century sought to dispel this mischaracterization of squirrel behavior - and discovered that squirrels are far from squirrelly-brained about food. Indeed, they're masterminds of planning for the future.Shutterstock"Whether grey squirrels remember where they have buried their nuts has long been debated," Jacobs and Liman write. But with their experiment, which involved eight grey squirrels, each given 10 hazelnuts, they observed that squirrels are not as forgetful as people have traditionally thought.The squirrels were each released alone in an outdoor area and allowed to bury their hazelnuts. The researchers recorded the hiding places each squirrel chose. Then, after two, four and even 12 days, the squirrels returned to the area. Even though the hazelnuts of each respective squirrel were buried close to each other, the squirrels "retrieved significantly more nuts from their own sites than from sites used by other squirrels."ShutterstockHaving a sharp nose, of course, helped the squirrels root out the exact location of their respective nuts.It's a lot of work for such a little animal, and surely they forget their nuts occasionally (and we can see the results when trees spring up from where they've forgotten their stash). But that they remember so many is a feat indeed. "Grey squirrels are active all winter," the study says, "and during this period they spend much time on the ground, apparently searching for caches and occasionally digging up and reburying a nut or acorn."The squirrels in the study, though, were observed to need self-imposed rewards for all their toil: They dug up and reburied several nuts - but not until they had first munched on a bunch of them.ShutterstockHave a tip? Contact firstname.lastname@example.org.