It's also illegal to 'take' certain birds at 'night'. Night is defined as one hour after sunset to one hour before sunrise (Wildlife and Countryside Act 1981).
I'd like to see the exact legislation for this because I've looked at the various wildlife acts and the general licence and can't find anything to support this, in England anyway. All I can find is that its illegal to use artificial light to take birds unless they are feral pigeons. In which case using moon light when roosting is perfectly legal.