<p>When the gibbons spotted the peanuts in a plastic water bottle in their pen, it wasn’t long before they began to battle for the snacks.</p><p>The two gibbons reside at the Endangered Primate Rescue Centre in Vietnam where they are treated to different toys every week. One week there were given a plastic bottle filled with peanuts – making snack time a little bit of a task! Credit: Polish Dr Dolittle via Storyful</p><br />
