The Impact of Climate Change and Tourism on Squirrels.

University of Manitoba researchers studying Cape ground squirrels in South Africa and Richardson's ground squirrels in Canada have found that climate change is affecting the animals' biology and behavior. Rising temperatures have caused the South African squirrels to have smaller spines and larger feet, while a temperature spike in Canada caused male squirrels to be unable to breed. The researchers warn that these changes could have wider impacts on the ecosystems in which the squirrels live.