Talk:Nevermore/@comment-5624349-20150824224125/@comment-4010415-20150825021912

It seems that, with Grimm, there aren't actually different types of any certain species. It all has to do with age.

An Ursa Major is just an older Ursa. As an Ursa gets older, it becomes bigger and stronger and sprouts more bone spikes and plates, thus "becoming" an Ursa Major.

As a Beowolf gets older, it becomes bigger and stronger and sprouts more bone spikes and plates, thus "becoming" an Alpha Beowolf.

Apparently, an older King Taijitu can have three heads instead of one, according to the crew.

Just to note, "Ursa Major" and "Alpha Beowolf" are fan names.