JAMESTOWN (AP) - A second white bison calf has been born in a herd on the edge of Jamestown that already touts an adult albino bison and her white offspring.

Staff members of the National Buffalo Museum were shocked to find the new white calf, born Saturday to a brown bison in the herd of about 30.

"To say we're all surprised would be an understatement," said Nina Sneider, director of Buffalo City Tourism.

The new calf's gender is not known, because officials have tried to avoid disturbing the new baby and its mother.

"They just kind of need to be together," said Felicia Sargeant, the director of the National Buffalo Museum in Jamestown.

"He has pink eyes. We can say with a pretty good percent of accuracy that he is albino," Sargeant said of the calf.

The staff did have to remove a sign proclaiming the herd's nearly 12-year-old albino female, White Cloud, and her calf, Dakota Miracle, as one in a billion. No one knows what having three albino bison in such a small herd means genetically.

"Obviously, we've got some luck going for us," said Dean Anderson, president of the museum board. "At least now, people will have a better chance of seeing a white buffalo."

Dakota Thunder, one of three bulls in the herd, carries the albino gene and is the father of the new calf, Sargeant said. There are no solid statistics on the odds of having one albino - let alone three, she said.

Dakota Miracle was born last summer and came through the winter as a healthy, growing young buffalo. He's nearly as tall as his mother and retains all the characteristics of an albino, Sargeant said.

"He's going to be a big, beautiful bull," she said. He also will add to the albino gene pool in the herd, she said.

Billboards touting White Cloud and Dakota Miracle are still up. It's too late to change the advertising for the summer season about how rare they are.

"We're past the point that we can redo or recreate them, so now it will be word of mouth, radio and television," Sneider said. "All you can say is, 'Who would ever have thought this could happen?'"