Your morning adorable: American bison calf at Vienna zoo

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Austria’s Schoenbrunn Zoo recently welcomed an American bison calf.

Female bison, like mother Resi here, are called cows. (Males are called bulls.) Cows give birth to their calves after a nine-month gestation period. When this little calf (shown here at 10 days old) grows up, it may weigh up to a ton; its horns alone can grow to 2 feet long.

More bison photos after the jump!

-- Lindsay Barnett