Squirrels are willing to work harder for better rewards

New research has found that squirrels are willing to work hard to get better rewards.

The scientific study, carried out by researchers from the University of Exeter, looked at the behaviour of wild grey squirrels.

They set up a test where they placed snacks, such as pumpkin seeds and almond pieces, on poles of different heights.

The researchers found that when the almonds - the squirrels' favourite snack - were placed on the higher poles, the squirrels were only slightly less bothered about climbing for longer to reach them.

Yavanna Burnham, from the University of Exeter, said: "The squirrels in our study were willing to work harder for the better food.

"This suggests that - in natural decision-making scenarios - it may sometimes be beneficial for animals to wait or work harder for a better outcome.

"This is what we would expect to find and it shows the value of doing research on wild animal populations."

In total, 11 squirrels took part in the tests and made more than 4,000 food preference choices, researchers said.

Dr Lisa Leaver, from the University of Exeter, added: "This study helps us understand how animals decide how much time and effort to invest."