millions of dead river shells on the banks of the danube near vukovar during the historic summer drought, vukovar - croatia

animal banks biology bottom broken clam clay climate coast crack croamilij croatia danube dead dirt disaster drought dry dunava earth ecological ecology environment environmental global ground heat historic hot hrvatska land landscape life many milijuni millions mud natural nature obali outdoor pattern pollution povijesne problem riječnih river riverside rough sand season shells shore soil stranded summer surface suše terrain textured uginulih velike vrijeme vukovar warming water weather wild školjki