An electronic ear tag allows an individual to track a herd animal. Further, the electronic ear tag is an ultra-low power, and lightweight tag that runs only when needed. The electronic ear tag includes a substrate, a microcontroller, a rechargeable battery, a wireless communication module, a global positioning system (GPS) module, and a solar panel. The substrate is a circuit board used to support the electronic components of the present invention. The microcontroller is used to manage and control the electronic components of the electronic ear tag. The rechargeable battery is the main power source of the electronic ear tag. The wireless communication module allows the electronic ear tag to communicate with a central network. The GPS module allows the electronic ear tag to communicate with a GPS satellite. The solar panel converts solar energy into electrical energy used to charge the rechargeable battery.