The National Zoo's Sumatran tiger cubs are doing swimmingly - or would that be roaringly?
The cubs received their first veterinary checkup Monday, and zoo officials say the brother and sister are doing just fine.
The male cub weighed in at over eight pounds while his sister weighs seven and a half pounds. Zoo officials say they are healthy and growing quickly.
The zoo's female tiger, Damai, gave birth to the cubs Aug. 5. Their father is the zoo's 12-year-old male tiger, Kavi.
The public won't meet the still unnamed duo anytime soon. Zoo keepers want to give Damai time to bond with her babies. The new family will be watched remotely and will not be put on exhibit for several months.
Sumatran tigers are a critically endangered species. It is estimated that between 400 and 500 exist in the wild. There are 65 Sumatran tigers living in accredited zoos in North America in addition to these cubs.
RELATED COVERAGE ON NBCWashington.com:
