In America the Center for Biological Diversity is taking legal action against the US Fish and Wildlife Service, to protect a fly from extinction.
The Zapada glacier, a stone fly only found in the alpine streams of Montana’s Glacier National Park, is threatened by glacial retreat.
There are more than 3,500 species of stone flies, ancient insects that spend most of their lives in water.
Between 1960 to 2012, the average summer temperature in Glacier National Park has risen by around one degree centigrade. In 1850 there were 150 glaciers in Glacier National Park; today just 25 remain.
Picture source: Flikr