Tourists are flocking to Lake Bogoria in Baringo County to watch a large number of flamingos thronging the lake.
The big number of flamingos, estimated at 1.7 million, pushes Lake Nakuru to second position in Kenya.
Mr William Kimosop, senior warden for Baringo County, says some 75 per cent of lesser flamingos, the most common type in Kenya, are found in Lake Bogoria.
"We top the world now. In fact, the numbers have been increasing for the past five years... This is the highest number we have seen in four years, making the lake the natural home of flamingos," he said.
Mr Kimosop said 150,000 local and foreign tourists visit the lake's shores each year.
Mrs Lydia Kisoyan, a senior warden, said there were one million flamingos in Lake Nakuru National Park, but the number had been fluctuating over the years.
The lesser flamingo is the smallest and most numerous, at probably two million worldwide.
There is also a large number of greater flamingos in the lake. Some of the birds in Lake Baringo migrate from Europe between October and March each year.
The lake boasts of some 472 bird species.
Lake Baringo is on Unesco's list of World Heritage Sites.