Discover the intriguing world of Nelson's Collared Lemming (<i>Dicrostonyx nelsoni</i>), a small yet vital rodent inhabiting the Arctic tundra of North America. With their unique collar-like markings and fascinating seasonal behaviors, these diurnal creatures play a crucial role in their ecosystem, from foraging on vegetation to serving as prey for iconic predators. As climate change poses potential threats, understanding their habitat and lifestyle is essential for conservation efforts.