The zoo says the critically endangered Amur (ah-MOOR') tigers were born April 28 and are in an off-display indoor den.
The zoo says the first-time mother, Kalista, is busy nursing and caring for her babies.
The normal litter size is two or three cubs. The five weigh 4.5 to 7 pounds each.
The species used to be called Siberian tigers. They are at risk because of habitat loss, human encroachment and poaching.
[Associated
Press]
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