ST. LOUIS — The Saint Louis Zoo has five new tiger cubs born late last month.
The critically endangered Amur tigers — two males and three females — were born April 28 and are with their mother, Kalista, in an off-display indoor maternity den. They weigh between 4.5 and 7 pounds each.
Normal litter size is two or three cubs.
The zoo says the first-time mother is busy nursing and caring for her cubs.
Two of the female cubs have been given supplemental feedings to boost their weight.
The zoo says the Amur tigers, formerly called Siberian tigers, are at risk, along with other tigers due to habitat loss, human encroachment and poaching.