The animal of the day is the Cottonmouth Snake aka the Water Moccasin. (Did you know: This is the only viper species that is aquatic [though only semi-aquatic]. Most other vipers are arboreal.
The name cotton mouth comes from it’s defensive stance in which it opens it’s mouth wide and bares it’s fangs. The white lining of it’s mouth apparently looks like cotton? I don’t think whoever named this really knows what cotton looks like.
You guys down in the southern swampy parts of North America would do well to read this.