Volunteers hold flamingo chicks after they were ringed at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

A volunteer holds a flamingo chick before it is ringed at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

A volunteer holds a flamingo chick before it is ringed at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the nature reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

Volunteers gather flamingo chicks before ringing them at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the nature reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

Flamingo chicks gather before they are ringed at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the nature reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

Volunteers gather flamingo chicks before ringing them at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the nature reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

Flamingo chicks gather before being ringed at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

A volunteer is silhouetted as he releases a flamingo chick after it was ringed at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

Volunteers walk into a lagoon to gather flamingo chicks at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the nature reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

Flamingo chicks gather before being ringed at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

Volunteers watch as flamingo chicks are released at the Fuente de Piedra nature reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS) 

A flamingo flies during sunrise at the Fuente de Piedra natural reserve, near Malaga, in southern Spain August 6, 2011. Around 600 flamingos were ringed and measured before being released into the lagoon, which houses one of the largest colonies of flamingos in Europe, according to authorities of the natural reserve. REUTERS/Jon Nazca (SPAIN - Tags: ENVIRONMENT ANIMALS)