Yes, the bird in the nest doesn't look like the bird posted in Wikipedia, if we can count on this website to be accurate. At first I thought it was a Common Raven, but I was wrong. The body types are different. The bird in Fireblade's picture looks like it has a raptor's beak, but we can't see its talons, to be 100% sure.
Here's an article in Wikipedia about Buzzards:CLICK HERE
I'm always interested in new birds. I rely on Cornell Lab of Ornithology, where I can get complete information. But there are no Buzzards in North America, so no information about them here. I have a paid membership to Birds of North America (part of Cornell Lab of Ornithology) where I can obtain detailed information about birds I come across in the wild and in the wildlife hospitals.
Beans I think they Buzzards (buteo buteo) are quite similar to our Red Tailed Hawks (Buteo jamaicensis) [Rough legged hawk (Buteo lagopus)] -- the calls seem similar to me. And I think they both come in lighter and darker variants. (ARKive says Buzzards vary a lot in colour althought the top is darker than the bottom)
I basically stand by this although after a bit of web searching it appears these common names can get rather confusing.
Arkive is pretty good -- information and pictures but I think it focuses on the fauna of Britainhttp://www.arkive.org/common-buzzard/buteo-buteo/
I think their ultimate goal is not just to focus on Britain, but so far it seems to focus on Britain.