However, it remains unclear what drives and regulates the global patterns of color variation over a long time scale. A research team studied 10,638 images of 1,249 species of scaled reptiles to ...

Snakes in these urban populations, they write, “accumulate trace elements, which are expelled when the skin is sloughed.” By measuring levels of trace elements in the evenly colored populations ...

With its stripeless, grayish-colored body, it has been called “drab” in color — but its irregular dark spots, small body and long, triangular head make it unique. Like water snakes, narrow-headed ...