Frantic nuthatch

My sunflower seed feeder was visited every 4 minutes by a nuthatch this morning - can't tell whether it is two birds alternating or one working frantically hard to feed its young. 

Was delighted to see very young blue tits and young robins using it too.  And a green finch came for an extended visit this afternoon.  I haven't seen one since they came with a charm of goldfinches and chaffinches last year but they are all messy feeders and wood pigeons benefit from their visit.