You're right, Carly, it seems there is a hatch!
From the site:
!!!We have a hatch?!
May 07, 2010 - Etobicoke - Sun Life Centre
Kathy Reports:
11:40 am and observed female flying around and male was in the nestbox quite visible. Female came in with food a minute later and they switched places and could see her head bobbing up and down, she did not lay down but looking more like she was giving food to someone. It was a quick feed and she then went to drop off leftovers to one of their cache locations which I clearly saw. She went straight back to the nest box and was fussing about and then alarm calling started from the nestbox. Female immediately went to roof ledge and touched beaks with male as he took off southward. She then went back into the nestbox but I could seeing her watching Jack, he headed towards some vultures and they took changed course. He returned to the ledge and to his perch. All is quiet for now.