5. Black Rat Snake:
Black rat snake is a nonvenomous species of Colubridae found in central North America. No subspecies are currently recognized.
It prefers heavily wooded areas and is known for having excellent climbing ability, including the ability to climb the trunk of large mature trees without the aid of branches. This snake is a competent swimmer.
6. Black Wolf:
A black wolf is a variant of the gray wolf. Genetic research from the Stanford University School of Medicine and the University of California, Los Angeles revealed that wolves with black pelts owe their distinctive coloration to a mutation which occurred in domestic dogs, and was carried to wolves through wolf-dog hybridization. Besides coat color they are normal gray wolves.