DENVER (AP) -- An endangered red panda gave birth to rare quadruplets at the Denver Zoo.
The quadruplets were born to Sophia, who is from Roanoke, Va.,'s Mill Mountain Zoo and He-Ping, who arrived at the zoo in 2007 from the Milwaukee Zoo.
Denver Zoo officials Thursday said the birth of the quadruplets July 9 was one of five such births documented at zoos nationwide.
Red pandas, or firefoxes, are native to the Himalayas where there are an estimated 2,500 living in the wild.
A relative to giant pandas, red pandas grow to the size of a house cat.
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