male marsh warbler singing in breeding season

male marsh warbler singing in breeding season acrocephalus acrocephalus palustris adult animal aquatic warbler avian background beak beautiful beauty in nature bird birdie birding birdwatching breeding brown calling close-up closeup common conservation environment fauna feather great reed warbler green male marsh marsh warbler natural nature ornithology palustris park passeriformes passerine perched reed reed warbler reeds singing bird sitting songbird spring wetland wild wild animals wilderness wildlife