But don't worry, they probably didn't go far. Just out of our camera range. Yesterday I went up to see, and there was not a sign of them anywhere. Not even food scraps. You see as they mature, they have to test their wings and sometimes that means they will fly (or actually float) down to the rooftop of a nearby building, and hopefully not out into the street. We have had chicks end up on the street, and that's when a concerned citizen will call us and we will relocate it back to the ledge and its box. So far this year, we have not had a report of any chick sightings on the streets or any casualties.
The parents will find them and bring them food until they are able to return to the box. And there they will grow stronger and observe their parents hunting. They will also try hunting themselves and when they are able, they will strike out on their own to find their own home.
And we want them to do that because we don't want them fighting for this spot. The ending is never a good one for one of them. So keep watching the camera, and they might eventually show back up in the box or on the ledge.