SEE SWARMS OF BUGS DESCEND LIKE A SUMMER SNOWSTORM

Each summer, millions of mayflies rise from the Ebro River, converging on the medieval stone bridge of Tudela, in northeastern Spain. Attracted by lamplights along the bridge, the insects swarm the area in a fluttering cloud of white wings. (Full story: http://bit.ly/1pQCsye)
  1. Mayfly “Snow"
    Millions of mayflies gathered over the medieval bridge give the impression of a summertime blizzard. (Photo by Jose Antonio Martinez)
  2. Surreal Surroundings
    A boy takes in the dense cloud of mayflies on the bridge. Being in a mayfly swarm “gives a tickle on our skin, like a gentle caress of silk,” Martínez says. (Photo by Jose Antonio Martinez)
  3. Nightlife
    Male mayflies (pictured) have more noticeable caudal filaments— long, sensory organs extending from the abdomen—than females. (Photo by Jose Antonio Martinez)
  4. Swarm Mentality
    Luckily for the town's residents, mayflies don't bite or sting. (Photo by Jose Antonio Martinez)
  5. Blinded
    Attracted by lamplights along the bridge, the insects swarm in a fluttering cloud of white wings. (Photo by Jose Antonio Martinez)