I am still pretty intrigued by the whole topic even if it's a spectrum. From what I've read, beavers build dams instinctually if they hear running water. This

I am still pretty intrigued by the whole topic even if it's a spectrum. From what I've read, beavers build dams instinctually if they hear running water. This applies to beavers raised in captivity that were separated from their parents. It's both an unusual behavior and one that seems (on the surface) like it would take plenty of reasoning.