Riyadh: Saudis crowded to camel races and sword-dancing this week at a desert cultural festival that has come to reflect growing anxiety over national unity and the loss of tribal Arab identity to Western culture.

The Janadriya began 22 years ago as a showcase for Bedouin cultural heritage of camels, tents, coffee pots and swords that seemed in danger of disappearing.

But as well as a jamboree of cultural affirmation, in recent years it has become an opportunity to encourage national unity, with state television showing King Abdullah Bin Abdul Aziz and other Saudi royals performing a Bedouin sword dance known as 'arda'.

"The theme and principle is that we all live in one country, and to unite all these regions together and allow each one to know the other," said Ahmad Al Shalan, an organiser of the event outside Riyadh, speaking at the camel races.

Sociologists say around half of Saudi Arabia's native population of 17 million hails from tribal, Bedouin origins. But even among those there can be a deep sense of separate identity that shows in seemingly small things such as different names for the sword dances and slight variations in dance moves.

Each region displays its dancing prowess at the Janadriya.

"We need to send a message to our new generation to let them know about the heritage and culture of our fathers and grandfathers, to keep in mind that whatever comes from the West we have always to stick with our culture," Al Shalan said.

"Now most of our generation are completely forgetting about these things," he added.

A crowd of well-heeled Europeans, mostly diplomats, sat in the grandstand, peering through binoculars as about 50 camels raced around the desert course.

The women sported dark sunglasses and exquisite hairdos, but still wore the black 'abaya' cloak that strict Saudi culture imposes on all women in public.

"Camel-racing has a special place. It's part of our heritage, it's more important than horse racing," said a camel owner from the Red Sea city of Yanbu, whose animal had just won.

"I've been doing this 14 years ... I have around 35 camels and they have all won before. They need special effort, special food, special training. And of course it requires money, or you cannot win," he said.

Camels have long been a central element in Bedouin culture, with multiple uses including as food, transport, war machine and even companion. The Arabic language famously has over 40 terms for different breeds, ages and genders of camel.

Mohammad Eyad, an owner from Makkah who has been racing for three years, said a prime Sudanese or Omani camel could fetch up to 1 million riyals ($267,000) at auction.

"It's not about running after prizes, it's a profession with breeding and experience," he said.

"When you win it really encourages you. It needs a lot of training, and there are prizes," said Hamoud Sadah from Sudan, referring to four-wheel drive vehicles presented by the Saudi National Guard, the festival organiser, to winning owners.