This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.NEW ORLEANS — A 6-foot-tall male reticulated giraffe calf weighed in at an impressive 150 pounds when he arrived on the morning of January 9 at the West Bank campus of the Freeport-McMoRan Audubon Species Survival Center in Lower Coast Algiers. The average labor for a giraffe is one to two hours. Tumaini, the mother, started giving birth at 6:30 a.m., but the calf didn’t make his grand entrance until four hours later. “It was longer than expected but everything was progressing normally, just slower, so we just watched,’’ said Michelle Hatwood, Curator of the Species Survival Center. “Most giraffe do not need any assistance; we would have intervened only if absolutely necessary.’’ Hatwood and her staff had known for months that a calf was on the way, but a giraffe’s 14- to 16-month gestation period can make it tough to pinpoint a likely delivery date. Because many animals give birth in the middle of the night, Hatwood added that it was a rare treat for animal staff to witness the breathtaking event.