Discover the fascinating Alpine Woolly Rat (*Oligoryzomys longicaudatus*), a medium-sized rodent native to the high-altitude regions of the Andes in Argentina, Chile, and Bolivia. Known for its soft grayish-brown fur and agile climbing abilities, this nocturnal species plays a crucial role in its ecosystem as a seed disperser. Currently classified as vulnerable due to habitat loss and climate change, efforts are essential to protect this unique rodent and its mountainous home.