No. Cougars are never black.
Yes.
Ferrets are native to Europe, but were imported into North America as pets; there are probably around a million pet ferrets there now. Black footed ferrets are native to North America
The black footed ferret is native to North America
Some black berry species are native to parts western North America including California. Black berries are related to boysenberries.
Black haw is native to the woodlands of temperate and subtropical parts of North America, Europe, and Asia.
A black gum is a variety of tree native to eastern North America, Latin name Nyssa sylvatica.
A black oak is an oak tree, Latin name Quercus velutina, native to eastern North America.
The black footed ferret is native to North America
A black walnut is a species of flowering tree, Latin name Juglans nigra, native to eastern North America.
Black Panther is not a species but wild black panthers in Latin America are black jaguars (Panthera onca), in Asia and Africa they are black leopards (Panthera pardus), and in North America they may be black jaguars or possibly black cougars (Puma concolor - although this has not been proven to have a black variant).
Blueberries, Strawberries, and Pawpaws are 3 - not sure of the others...Tomatoes, squash, cranberries, black cherries, avocados, bell peppers, pumpkins, and black raspberries are common fruits and vegetables originally native to North America. Also maybe potatoes, yucca and green beans depending on your definition of vegetables. Strawberries and blueberries were native to both North America and Europe.
An American black bear is a bear native to cool climates in North America, Latin name Ursus americanus.