Crow or Rook?

I'm not sure whether this is a crow or a rook but I saw him down by the river today and just had to snap him. I took lots of photos today and couldn't make up my mind which one to upload. I've got several of this bird either on the ground or in the trees and lots of seagulls, flying, swimming, standing, etc. and lots of geese and ducks. it was very cold and I think the birds were all trying to sit fluffed up to keep warm.

[Rosie Kind]

I've discovered that it's a crow because it has a black beak

[Laynalynn]

Nice capture. The feather detail on his back is great.

[K J Buehl]

Splendid Capture! Like the detail and look how green the lawn is! ! ! Our winter has begun. Nicely done, Rosie!

[Jennifer C]

lovely detail rosie!

[Rosie Kind]

@laynesgram @kbuehl @jenrobcarr Thanks - I took this picture on the grass by the river in Bedford. It is a lovely place to walk and you can usually capture some bird or other down there and I do love birds

[mark]

Yup, carrion crow, & usually difficult to get close too, well done.