JAMESTOWN (AP) - White Cloud, the albino bison that has been a tourist attraction here for 11 years, has given birth to a calf that could be a rare albino as well.

Bob Mountain, the treasurer of the board of Jamestown's National Buffalo Museum, said White Cloud and her calf were spotted for the first time Saturday. The calf is believed to have been born late Friday night. Officials said they did not know whether it is a male or female.

"Nobody has got close enough," Svitlana Rott, a museum spokeswoman, said Tuesday. "We're trying to keep it natural."

White Cloud has been keeping her new baby in the shade. "Once in a while, she comes out," Rott said.

"It has a pink nose and ears, so I think i"s an albino," Mountain said. "But it will be a while before we know for sure."

White Cloud is a DNA-tested albino bison. The calf is her fifth since she joined the Jamestown museum herd 11 years ago.

Officials say the odds of a white calf being born are extremely rare. Many bison born white eventually turn brown.

The odds of White Cloud giving birth to an albino bison are considerably better than normal, however, Mountain said, because she was bred back to her only bull calf, Dakota Thunder. The process, called line breeding, gave her a 50-50 chance she would have a white calf, he said.

"You line breed for certain traits," he said.

Daniel and Jean Shirek, of the northeastern North Dakota town of Michigan, own White Cloud and lease her to the buffalo museum. The Shireks also are joint owners of the new calf with the museum.

The white buffalo is sacred to most Plains Indian tribes and is often seen as a sign of great changes in the world. To some tribes it is a blessing. Others believe it is a sign of peace, prosperity, unity and hope.

The birth of a white calf is a boost for tourism in Jamestown, said Buffalo City Tourism Director Nina Sneider.

"White Cloud has been a tremendous draw for the last 11 years, and I'd guess we'll have even more visitors now," Sneider said. "We get visitors, even in the dead of winter, who want to see her."

Sneider said it doesn't matter whether the calf is an albino or was just born with a white hide; it's still a rarity. Part of the Lakota legend speaks of the white buffalo changing to a brown one as it walked, she said.