This one was taken near first light the morning after our near 24 hour long snow event a few weeks back. Mom seemed to have stayed the night in the nest, presumably helping to keep the chicks warm and out of the snow. The family seemed pretty miserable, but all three chicks made it through. In this one, mom is in behind two of the chicks that are visible.
“End of a Miserable Night”
Technical details: Canon EOS 7D camera, EF500mm f/4.5L USM lens, ISO 400, f/7.1, 1/200 sec
A Thousand Acres of Silphiums 
Should have made the 5 and 10 o’clock news. Fantastic.
Isn’t that a bit of hair and blood stuck to the rim of the nest tree just above the right eye of the owlet directly beneath Mom?