My nestbox has got starlings in it and I wanted sparrows. Can I chase them out?
NO! It is an offence under the wildlife and countryside Act to disturb any nesting bird (one reason why cameras are so useful). If you get starlings and you wanted sparrows, you will just have to wait until they have finished nesting, between August and January. For some species (e.g Barn Owls) it is also an offence to disturb the birds.