Glacier mice

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Glacier mice are colonies of mosses found on some glaciers and adjacent ecosystems. They are composed of multiple species of moss and can also host other species, such as nematode worms, springtails, and water bears. Although what preconditions are necessary for glacier mice to form has yet to be determined, they have been observed in Alaska, Chile, Greenland, Iceland, Svalbard, Uganda and Venezuela, as well as several sub-Antarctic islands. In at least some cases, glacier mice apparently reproduce asexually due to the effect of the harsh glacier environment on traditional moss reproduction strategies. Glacier mice are notable for their movement across the ice, which appears to be non-random, taking the form of herd-like behavior. This movement does not appear to be solely the product of wind or the direction of a slope.