Calling in a fox with a homemade tenterfield whistle. I was using the whistle for less than a minute and this fella arrived on the scene! He was about 6 feet away and staring me straight in the face! The tenterfield whistle replicates the sound of a distressed or injured animal. When the fox hears this he thinks he's in for an easy meal! The whistle is easily made from a piece of scrap metal or even the lid of a tin can. As you can see it is very effective at luring in a fox!