sentence: Some birds can also 'sing'.
sentences_before: All birds make sounds to communicate. The types of noises that they make are different. All birds have 'cries' which are the sounds to communicate.
sentences_after: These birds are called 'songbirds'. Some songbirds are robins, larks, canaries, thrushes, nightingales and crows. Birds that are 'not' songbirds are pigeons, seagulls, eagles, owls and ducks. Parrots are not songbirds, even though they can be taught to sing human songs.
concept_name: bird
headings: Bird Behaviour Communication
categories: Basic English 850 words