Sparrows in Florida Are Struggling to Find a Mating Partner — Thanks to Toxic Metal in Water Sources

These sparrows, called “Cape Sable seaside sparrow,” have been known to be endangered for the past six decades. Residing exclusively in Everglades National Park and Big Cypress National Preserve, these songbirds are the target of water mismanagement and habitat degradation provoked by human activities. The metal, notorious for its toxicity, is slowly robbing them of their mating abilities. And while they struggle to find a mate, mercury is outspreading its territory, metastasizing into a giant beast that is pushing the birds into an irreversible collapse.

Lead researcher Alan Mock, a doctoral candidate at Florida International University, had been studying these sparrows for several years. When he realized, in plain sight, that their numbers were dwindling on the charts, he felt concerned. When he tested the biological composition of their bodies, the results engulfed him in shock, per Earth. The more mercury they had in their bodies, the less likely they were to participate in the mating activity.

It might seem, at first, that eradicating mercury from the Everglades could be the trick to liberating these sparrows’ breeding rate. But, unfortunately, this is not a possibility because this shiny, silver-white metal doesn’t originate in the Everglades. The liquid D-block element emerges from exploding volcanoes and rocks that are withered and eroded by storms. Once released into the air, either from a volcano’s mouth or a mountainside, the metal clings to the winds and travels long distances, gradually making its way into the water streams that dribble and flow along the sloping hillsides, spilling into seas and oceans.

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