Only the boys have ventured onto the box edge so far and none have tried to jump down on the narrow building ledge that runs to the left from the nestbox along the side of the building. Yellow male has the least fluff, white male is the smallest, green female is the smaller of the two females and red female is the larger and the chick with the most fluff. And yes, the tape is still on everyone's leg bands and will definitely make it much easier to id the birds when they do start flying - well, as long as they show us their feet!