First day of a spring those too (male and female of Corvus Cornix) came to check their old nest. The next day was for a closer inspection, they checked little branches and removed some snow. Our couple is very accurate and farsighted, normally crows do prepare their nests at the end of March.
The nest is not too far from our windows, it's on a fork of an old rowan tree close to a new playground. I'm a bit worried about it, since this spring would be the first one for crow's nest over the kid's heads. Won't they worry about nestlings safety? However the nest is not exactly over the kids area and there is a chance it'll all go well.
Can't wait to see little chicks :)
More about a Hooded Crow in Wikipedia