Or possibly it’s a rook or a crow or a corbie.
Like many outdoor sculptures this raven was not easy to photograph as one has little influence on the background if the bird stands in the middle of a private garden.
Lots and lots of backlighting added. 
A change of the colour tint. 
The area around the head left untouched, the rest of the photo changed to impressionist dabbing. 
Similar effect, except that the surrounds are deliberately made grainy.
pictures imperfect blog 