Four Ravens born in the Winter

I received an email this week alerting me to a sighting of an active Raven nest close to St.Pauls Hospital here in the city.
Once at the site , we could see the nest about three quarters of the way up a tall Spruce tree.
At first it was unclear how many young were at the nest, but on further inspection , 4 healthy fledglings were counted.
Interestingly, the parent birds were already constructing a second nest under the existing one ! I don't know if they expect to have more young or are just adding an extension :-)
This is a very early record for breeding of this species in Saskatchewan. , 2 months earlier than a previous record.
Apparently the eggs hatched sometime in mid-January , so those Ravens were incubating eggs in some pretty horrible weather.
From my only decent vantage point , the Sun was glaring right at me , and the reflection bouncing back off a glass window didn't help matters , so photo opportunities were pretty dismal. At least you can make out the four young . One of them is pretty well fed as you can see . Both parents were keeping watch on the roof of a nearby building.