Dirty water in the Guadalquivir river with a heron in the background

dirty water polluted water heron river environmental pollution wildlife nature water pollution bird ecosystem habitat aquatic life scenery outdoors environment riverbank fauna guadalquivir river contamination landscape wetland water quality avian conservation wildlife habitat ecological impact biodiversity river environment natural habitat spain pollution wildlife observation natural scenery heron background riparian environmental conservation rural bird watching environmental impact heron view river pollution natural setting avian life heron habitat brown