LAKE NAKURU NATIONAL PARK, Kenya – The famous flamingos of Nakuru are fading away.

The spindly, exquisite birds, clouds of pink rising on a million wings in generations of tourist photographs, are dying, flying off, fleeing a seemingly fatal brew of environmental threats in a shrinking Lake Nakuru, the home that has sheltered them for uncounted centuries.

Where just six years ago as many as 1 million flamingos fed in Nakuru’s shallows, in vast rosy carpets of plumage, hooked beaks and curved necks, as few as 30,000 stay-behinds hug the equatorial lake’s receding shoreline. The carcasses of many hundreds of dead flamingos litter newly dried and caked sections of lakebed.

Nakuru, whose recent maximum size was less than 20 square miles, may have lost half its water in the past few years, residents say.

“Something must be done,” said Jackson Kilonzo, manager of the Lake Nakuru Lodge. “People have to come together and decide to do whatever it takes to bring the water level back up.”

Precisely why the shallow lake and its flamingo population are shrinking remains a complex question.

The water catchment area around Nakuru has been heavily deforested, and its rivers are running dry. Years of drought have further reduced the water supply. African temperatures, like global temperatures, are rising. Sewer and industrial runoff from nearby Nakuru town pollute the lake. And its blue-green algae, the flamingos’ food, has diminished with the lake.

The flamingo, to many, symbolizes Africa as much as the lion or rhino.

Ancient Egyptians revered the impossibly graceful bird. In her classic 1938 memoir, “Out of Africa,” Karen Blixen told of a vast flamingo flock alarmed by duck hunters: “At the first shot they rise in a cloud, like dust from a beaten carpet; they are the color of pink alabaster.”

Such sights have drawn 200,000 visitors a year to Lake Nakuru, long home to what was believed to be the bulk of the global population of lesser flamingos, one of two species, with greater flamingos, inhabiting Nakuru, in the Rift Valley 100 miles northwest of Nairobi.

Lake Nakuru – mean depth 8 feet – has shrunk before, even disappeared. But this time, because of global warming, it may be different.

“The lake is threatened by deforestation and other problems, but now with a climate signature on top of that,” said U.N. Environment Program spokesman Nick Nuttall. The shallowness of many Rift Valley lakes makes them vulnerable as temperatures rise and more water evaporates.

Where will it end?

“The life of the flamingo depends on the water level, and we haven’t had reliable rainfall for years,” said lodge manager Kilonzo. “Tourism is the lifeline of this area. Without the lake and the flamingos, our lifeline is threatened.”