Shepherds from across the world joined their Spanish colleagues to lead flocks of sheep through the streets of downtown Madrid on Sunday in defense of ancient grazing routes threatened by urban sprawl and manmade frontiers.

While every year Spanish herdsmen protest their rights by herding hundreds of sheep along the capital's exclusive, tree-lined boulevards and luxury store-filled avenues, this year they were joined by colorfully attired shepherds from 32 countries who had been taking part in a world gathering of nomad and transhumance shepherds.

Transhumance is the practice of seasonal livestock movement. In Spain, it involves a million animals -- sheep, cattle and others.

The Spanish protest, now in its 15th year, seeks to highlight a tradition that has for centuries allowed herdsmen the right to use 78,000 miles of Spanish paths in seasonal livestock migrations from cool highland pastures in summer to warmer low-lying spaces in winter. Some paths have been used annually for more than 800 years.

Modern-day Madrid lies squarely in the way of two venerable north-south routes, one dating back to 1372.

A relatively modern city by European standards, Madrid inherited its status as capital of Spain's empire only when King Philip II fixed his court here in 1561.

As a result, the Puerta del Sol -- a thronging plaza that is the Madrid equivalent of New York's Times Square or London's Piccadilly Circus, now lies in the way of one of these routes.

While the routes are protected by Spanish law, modern life including housing developments, highways and railways have eroded time-honored paths.

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I love these sorts of protests!

Find an original way to protest.

I still think masturbating for peace is the way to go!

My what a big staff you have, Beluuushiiii

All the better to keep things in order, Roxy ...

Lovely