Sticky Beak

Sticky Beak is a children's novel first published in 1993. Written by English-born Australian writer Morris Gleitzman, it is the sequel to "Blabber Mouth". The novel is set in Australia and follows the misadventures of a mute Australian girl called Rowena Batts (or Tonto for short). " Sticky Beak" won the CROW award in 1994.
Plot summary.
"Sticky Beak" picks up from where "Blabber Mouth" ends. Rowena's father is now married to her teacher, and at a function she throws a plate of custard and jelly into a fan, splattering it over everyone. As she tries to avoid the consequences, she rescues an abused cockatoo from the neighbourhood bully, Darryn Peck.