Bird control: What is it like to work as a falconer?

Mark White, of Norwich, travels across East Anglia with his Harris hawk Faith.

The four-year-old hawk is just one of the tools in his arsenal to control unwanted bird populations.

Mr White, who works for Suffolk-based Step Pest Control, says the purpose of hawks is not to kill other birds but to disrupt them so they move somewhere else to eat and roost.

BBC News Online joined him and Faith during a pest control job in Cambridge.