Common Raven at nest in cave

I have been monitoring a pair of Common Ravens that have nested in a small cave in the side of a cliff near Canon City. I suspect this is the same pair that I followed last year as they nested only a few hundred yards away and have been staying in this territory over the winter. I have found it is very difficult to take photos that show the inside of caves, especially those that are 600-800 feet away and high up the cliff that provides shade all day long. Here is one of the parents perched at the opening to the cave. The nest is somewhat visible in this pic. SeEtta