Does the black bear eat a cougar or is it other way around?

It's not a typical scenario for either a black bear or a cougar to eat each other. Here's why:

* Black bears are generally herbivores: Their diet primarily consists of plants, berries, nuts, and insects. While they might occasionally scavenge or prey on small animals, they don't actively hunt large prey like cougars.

* Cougars are apex predators: They are skilled hunters and typically target deer, elk, and other large mammals. Black bears are simply too large and strong for a cougar to successfully take down.

However, there are some rare exceptions:

* Competition and territoriality: Both black bears and cougars can be territorial, and there might be cases where they encounter each other and fight. In such situations, the outcome would depend on the individual bears and cougars involved, their size, and other factors.

* Scavenging: Both species might scavenge on carrion, which could lead to encounters and potential conflict.

Overall, it's highly unlikely for either a black bear or a cougar to regularly prey on the other. They are more likely to avoid each other or compete for resources in a way that doesn't involve one directly eating the other.