Rooks....again....

I've often seen Rooks who have extra large beaks like this but I cannot find anything about why this is, either on the internet or anywhere else.

Also today I saw the two most wrecked Rooks I have ever seen flying about. Most of their wing and tail feathers missing. They had to work hard just to stay in the air. And they were the two who flew closest to me to see what I was doing (Nothing). Maybe it was their curiousity that nearly got them killed. But their inquiring spirit was undaunted. Maybe you can't learn any thing really new unless it nearly wrecks you....