Cliffs of Moher (Ireland) - razorbills or guillemots/murres? (1 Viewer)

[ParisNorway]

I'm leaning towards group A being common guillemots, group B being razorbills.

Photo of group A:


Photo of group B:


Bonus question, is this bird recognizable as great black-backed gull?

 

[ParisNorway]

Additional photo of two gulls in the same spot as above gull:


And group C of birds:


Group D:

 

[Southern Viking]

The gulls are indeed Great Black-backed. The auks a mixture of Guillemots and Razorbills, even group A has both in, though C and D are only Razorbills

 

[lockbreeze926]

Agree with Southern Viking.

 

[Southern Viking]

As extra notes on the auks, obviously hard to tell from these photos, but (pro-) Guillemot vs Razorbill things to look for are browner upperparts, flank streaking, white of chest extending further onto the dark chest, and obviously bill shape. Some of that is shown on the link below (flank streaking is often more clear on Guillemot than in the link though) https://blogger.googleusercontent.c...tdF7iHRAMBxZWTmuHW0InEz7PwA/s640/IMG_1166.JPG

I'd say the majority of your auks are Razorbills, and it's often the case that at the bottom of cliffs Razorbill dominate and higher up, Guillemots do