Unknown Raptor

[nkwali]

Seen near Boise, Idaho this week; environment was in rolling hills/grassland area; perched on one of the few trees around.
I have no idea what kind of raptor this might be...any help would be greatly appreciated.

Thanks!

Unknown Raptor
Unknown Raptor by Nkwali, on Flickr

Unknown Raptor - close up
Unknown Raptor - head shot by Nkwali, on Flickr

[Pat Hodgson]

juvenile red-tailed hawk

[nkwali]

thanks Pat