savi's warbler, locustella luscinioides. a bird sits on a reed stalk on a riverbank

savi 039 warbler locustella luscinioides bird river pond lake natural european nature closeup wild avian isolated animal portrait singing background spring wildlife reed male birding water sitting songbird beautiful beauty europa song feather beak migration springtime environment ecology ornithology call season perch outdoors duck migrant ukraine birdsong brown habitat