sentence: Songs have different functions.
sentences_before: Songbirds are passerines, many of which have beautiful melodic songs.
sentences_after: Danger cries are different from territorial songs, and mating calls are a third type. Fledgling may also have different calls from adults. Recognition calls for partners are quite common.
concept_name: song
headings: Bird Behaviour Communication Songbirds
categories: Basic English 850 words