Another warm day here in Vermont. Mom has been out of the box most of the day, returning regularly with food. Late morning, after the box had been in direct sun for several hours, the chicks seemed to be a bit uncomfortable and squirming. The box has several vent holes just below the roof line. Hope they're helping. The chicks won't have to be uncomfortable much longer, the first day they're likely to fledge is Saturday the 22nd.