Putting up your nest box is really only half the fun - to get the most out of it, take up the Nest Box Challenge and help to monitor the breeding success of birds in Britain's green spaces. Nest Box Challenge is a joint project between BTO and the BBC Breathing Places campaign.

Nest Box Challenge gives you the opportunity to help the BTO learn more about nesting birds in the UK. Anyone with access to a nest box can take part, all you need to do is register the nest box(es) in your garden or local area and record what's inside at regular intervals during the breeding season.

!In order to take part, you simply need to register online for the Nest Box Challenge and answer a few questions about the garden or green space in which your box is sited and a bit about the box itself. You will then be able to record details of any birds you see using the box and even what you find when you look inside.

For more information on the annual Nest Box Challenge plus advice on monitoring and inspecting boxes check out www.bto.org/nbc.