Coal skinks (sometimes called coke skinks) are native to North America and are now common in some parts of the country.
They’re found in the Northern Rockies, where they’re a source of fuel for wood-burning stoves and boilers.
Coal skink numbers have been declining since the 1950s, with the average number of skinks down to just 300 in 2010.
The species is thought to be declining in the United States, but some studies have suggested it’s increasing in other parts of Canada and Europe.
The new study, published in the journal Science Advances, examined the genetics of a skink that’s found in parts of North America, as well as in Europe and Asia.
The study found that the gene that causes coal skinking is present in the genes of many other skinks that live in the same area.
The genetic sequence was similar to those of skink populations in Europe, but the genes in Europe were more diverse, with several distinct populations of skunks living there.
This diversity may explain why skinks have evolved a diversity of coat colors, which vary from dark to light.
Researchers speculate that these coat colors help skinks avoid predators, and that some skinks also have camouflage to help them blend in with their environment.