1) Bird genus 2) Genus acrocephalus 
[bird] The Acrocephalus warblers are small, insectivorous passerine birds belonging to the genus Acrocephalus. Formerly in the paraphyletic Old World warbler assemblage, they are now separated as the namesake of the marsh and tree warbler family Acrocephalidae. They are sometimes called marsh warblers or reed warblers, but this invites conf...
[n] - a genus of Sylviidae
genus Acrocephalus noun a genus of Sylviidae