The ultra-long-distance migrating mule deer known as Deer 255 has died. Researchers tracked her across 3,300 miles since 2016. Here, she is shown with her twin fawns in a fall 2020 migration stopover ...

Last year, some Wyoming wildlife managers began receiving weekly updates on mule deer roaming their region. The near-real time data is just one component of a “state of the art” program monitoring ...