A more thorough explanation:

Ferae naturae is a Latin term that means wild animals. It refers to any animal that is not considered a domesticated animal by law.

These animals are generally considered to be the property of no one, but if someone captures one, they can obtain a property interest in it. However, the owner or possessor of a ferae naturae can be held liable for any actions of the animal.

For example, if someone captures a wild deer and keeps it as a pet, they are responsible for any damage or injury caused by the deer. Similarly, if a wild bear wanders onto someone's property and causes damage, the property owner may be held responsible for not taking proper precautions to prevent the bear from entering their property.

It is important to note that negligence by the owner is presumed when a ferae naturae causes injury to someone. This is different from the rule with domesticated animals, which does not create an assumption of negligence on the part of the owner.