Flamingos, herons and fish once filled a freshwater lagoon in southern Spain. Today, it's a fetid brown splotch. The whisper of wind in the grass is a sad substitute for the cacophony of migratory birds.
Biologist Carmen Díaz steps onto cracked mud. The lagoon in the heart of Spain’s Doñana nature reserve is a puddle. The park called “the crown jewel of Spain” may be dying.
