On March 2, Shera, a 9-year-old African lion, gave birth to second litter of cubs.
In all, there are four cubs. The zoo says they appear healthy so far. The father is an 8-year-old lion named Luke.
Zoo officials say they are "cautiously optimistic" that the cubs will thrive based on Shera's passed successful litter.
The cubs will likely be on display in early summer.
(Clyde Nishimura, Smithsonian's National Zoo)
Clyde Nishimura, Smithsonian's National Zoo
(Lauren Augustine, Smithsonian's National Zoo)
Lauren Augustine, Smithsonian's National Zoo
(Susan Murray, Smithsonian's National Zoo)
Susan Murray, Smithsonian's National Zoo
(Smithsonian's National Zoo)
Smithsonian's National Zoo
(Smithsonian's National Zoo)
Smithsonian's National Zoo
The bear being hand-raised is the only one who who survived (thanks to zoo staff's intervention) after the Khali ingested the first cub shortly after birth and ingested the second cub a week later.
Veterinarians and zoo keepers have provided round-the-clock care for the past two-and-a-half months. The bear is thriving.
(Courtesy Stacey Tabellario, Smithsonian's National Zoo)
Courtesy Stacey Tabellario, Smithsonian's National Zoo
The bear's two siblings did not survive more than a week and zoo staff decided to intervene and rear the remaining cub themselves -- a move that likely saved the cub's life. The sub is now almost three months old and is thriving.
(Courtesy Stacey Tabellario, Smithsonian's National Zoo)
Courtesy Stacey Tabellario, Smithsonian's National Zoo
(Courtesy Stacey Tabellario, Smithsonian's National Zoo)
Courtesy Stacey Tabellario, Smithsonian's National Zoo
Animal care staff at the Smithsonian Conservation Biology Institute in Front Royal, Va. are celebrating the birth of three male Dama gazelles. The calves were born Feb. 18, Feb. 20 and Feb. 25. At their 24-hour neonatal exam, the first calf weighed 11 pounds and the second and third calves weighed 12 pounds each.
(Courtesy Dolores Reed, Smithsonian Conservation Biology Institute
Courtesy Smithsonian Conservation Biology Institute
Smithsonian National Zoo/Flickr
The zoo published this video Feb. 5, 2014.
,br> (Courtesy National Zoo)
Photo: Clyde Nishimura, FONZ Photo Club
Courtesy Janice Sveda/Smithsonian Conservation Biology Institute
Tracey Barnes, Smithsonian's National Zoo
Tracey Barnes, Smithsonian's National Zoo
Janice Sveda, Smithsonian's National Zoo
Clyde Nishimura/Smithsonian's National Zoo
Clyde Nishimura/Smithsonian's National Zoo
Photos: Janice Sveda/Smithsonian Conservation Biology Institute
Photos: Janice Sveda/Smithsonian Conservation Biology Institute
Photos: Janice Sveda/Smithsonian Conservation Biology Institute
Photo Credit: Janice Sveda, Smithsonian Conservation Biology Institute
Courtesy Smithsonian Conservation Biology Institute
Courtesy Janice Sveda/Smithsonian Conservation Biology Institute
Courtesy Janice Sveda/Smithsonian Conservation Biology Institute
Courtesy Janice Sveda/Smithsonian Conservation Biology Institute