Sparrows spar by sharing songs

Far from being a harmonious sing-a-long, song-sharing among sparrow populations is actually an aggressive behaviour, akin to flinging insults back and forth.

Sparrows use their songs as attract attention and advertise themselves as potential mates and when sparrows song-share – singing from a small number of their species’ “greatest hits” – they are acting in an aggressive, attention-seeking manner.

Read more at Queens University Biological Station