2003 seemed to be the year of the mammal. These staged mages were from the press package, not from the show itself.
I designed all of the creatures and saw to their build. the fur was problematic... I am quite happy that there have been some advances in that field, as it was quite difficult to get even modest results.
It took months of research, more than I realized, because the depth of literature is nowhere near that of Dinosaurs, even though it's likely the fossils are much more numerous.
The images show the giant elk 'megaloceros' and the giant bison 'Primigenius'. everything had a name prestaged with 'Giant'.
Image: Evergreen Films