Here are some photos of a skull that I found on Chesil Beach, Dorset a few weeks ago.
The closest matches that we can find so far are Red-breasted Merganser or Shag, which I found on this rather impressive website http://www.skullsite.com/index.htm . However some differences, eg. the detail at the back of the cranium, mean that we’re not quite convinced.
This specimen’s vital stats:
Cranium length - 53mm
Cranium width – 31mm
Bill length (incomplete) – 52mm
Any further id assistance in solving this gratefully received.
Skullsite is an excellent ressource ad I use it in such cases as your specimen. I'm sure its a Shag skull. The next closest match would be the Cormorant, only larger and different shape, sagital crest, etc. Mergansers are ducks, just look at their large nostrils in the middle of the bill and you will dismiss this group. Compare with other possible groups: divers, grebes, gulls, but the general structure is very different. Gannets are actually the closest match outside the cormorant group, but not quite. I say Shag, Phalacrocorax aristotelis. (not aristoteles - wrong name on skullsite)
Thanks Florin, glad one of my suspicions was right! The duck nostril detail wasn't immediately clear from the Skullsite's merganser picture but I see what you mean now.
Thanks again for getting in touch.