Tehran (ISNA) – It has been two weeks since the mysterious deaths of migratory birds in the Miankaleh Peninsula, located in Mazandaran province.

Many experts believe that the tragedy occurred due to the presence of avian botulism in water, but the root cause has not been identified yet.

A team from Mazandaran’s Department of Environment has collected approximately six thousand carcasses of coots and flamingos thus far.

Photographer: Mostafa Shanechi