The stork landed at Zoo Atlanta this week, not once, not twice, but three times.

Motherhood came to the attraction's warthogs, Malayan great argus and black and white ruffed lemurs, Zoo Atlanta officials said.

Zoo Atlanta (ENLARGE)

Warthogs were among the animals born Wednesday at the zoo.

And they came in unison. Each of the tykes was born Wednesday.

"It is unusual to have that many births on one given day," spokeswoman Keisha Hines-Davis said of the births. "That's definitely an unusual occurrence. This week 'Babies R' Us.' "

Zoo guests can see the argus chicks on display now, while they will probably have to wait at least six weeks to see the others, Hines-Davis said.

Shirley, the warthog — one of the attraction's newest animals — gave birth to four piglets, but lost two, said Lori Perkins, director of animal programs for Zoo Atlanta. A third is in critical condition.

"It's not unexpected with pigs," Perkins said of the deaths. "That's why they have large litters. It's typical of the species."

The remaining piglet, a brownish-gray 8-incher with a healthy squeal, is doing well, Perkins said, not that officials have been able to spend much time with her.

"Shirley is being a great mom, which means she is being very protective of the little one," Perkins said, explaining that Shirley snorts, grunts and gets generally agitated when officials have tried to take a peek at her young one. "We're very pleased to see that she has been so protective."

Meva, the mother of the two lemurs, has not been as maternal. Zoo Atlanta officials found them abandoned by their mother, forcing handlers to hand rear them, Perkins said. The mother is not lactating, but Perkins was unsure if that is behind her lack of interest.

"We reintroduced them to her and she has not shown a lot of interest, which is unusual because she is a good mom," Perkins said of the lemur, who has had two other litters. "They are doing great," she said of the lemur babies. "We are feeding them formula every two hours."

And after five years of trying, the zoo's great argus had two chicks, both of which are "doing fabulously," Perkins said. The pheasant-like birds from Southeast Asia — which resemble baby ducks when they are young — went on exhibit without any problems.

"The mother is taking care of them and she is following them around," Perkins said.