reed warbler

Short definition from Wiktionary

Noun

1. 1
   A warbler, of species of Acrocephalus scirpaceus in family Acrocephalidae, native to Eurasia and Africa.
2. 2
   Any of various similar Old World birds of the same genus, especially great reed warbler (A. arundinaceus) and clamorous reed warbler (A. stentoreus).