Receiving clear signals from radio-tagged animals can be difficult to achieve and is often a very labour intensive and expensive process. The main issue is height. When using hand-held radio-tracking from the ground, you often have to get the antenna as high as possible in order to improve signal detection. This often means finding higher ground, or even hiring helicopters or planes to get the slightest “ping” of a distant radio-tag. Unfortunately, it also often results in losing track of the precious animals you have worked so very hard to tag in order to understand their movements.