Blue tit feeding at night

  •   Hi, we have blue tits nesting in a nesting box on our wall. Our security light just came on - which let me see that the adult is still flying back and forward every 4 or 5minutes in to the box. Stops for normal feeding time, then leaves again. It's almost 2am, surely the adults should be getting rest at this point? Also, how do they feed in the dark - it's a dark woodland over the back of our house. Thanks, lynsey