A skull I thought at first ... but apparently not. Read on (below)
The 'vents' on top are interesting (image #3) as is the intricate internal bone structures under them (image #4).
The 'spade' bones in the 'nasal area' look quite distinctive too (image #3).
I'm no expert, but I would think the 'nasal' cavity on this skull is exceptionally large ... perhaps that can help to provide a more precise ID.