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What is the Migration Period art animal style?
Animal style art is an approach to decoration found in  the barbarian art of the Migration Period, characterized by its emphasis on animal motifs.
What animal is mentoned in the animal style Wikipedia article?
Steppe jewellery features various animals including stags, cats, birds, horses, bears, wolves and mythical beasts.
After bear what other animals are mentioned in the animal style Wikipedia article?
Bears, wolves and mythical beasts.

Question: How many styles were classsified?
Self-contained rewrite: How many styles of Migration Period art were classified?