User blog comment:D2r/Unanswered Questions of Redwall/@comment-3462718-20110426182801

As to 16, (I did a report on martens in school, so this is how I know this information) Pine Martens are, in real life, highly solitary and territorial creatures. They do not go anywhere near each other except in breeding season; if they do happen to accidentally cross paths with each other, they fight. They are also a comparitively rare animal. This may be the reason why BJ only had three of them ( you forgot Atunra from High Rhulain) in his series.