Southern Sea Bird. Blue Petrel??

[Bopbop]

In Southern Ocean near South Georgia 2 weeks ago. Don't really fit Blue Petrels in discontinuity of black head and neck extension. The one that is almost horizontal to the water in the group does have a white splash(dot)at the tail end as does the single bird??. Ebird's Vanuatu pix almost look like them in head and neck (not tail) but that is ridiculous. Last time I asked something in these forums I had passed over the bird in iBird about 12 times and it was in reality an easy pick but I was dense. Be gentle.  

[chipperatl]

Do not accept my word as final.  I am trying to study up on Seabirds for a hopeful pelagic next year, and just ran across Great Shearwater as having that smudge on its belly.  I skim through fairly quick on anything that isn’t likely to be seen off North Carolina coast, so I may be missing some, and haven’t finished the whole book.  I don’t remember anything else having that field mark.  It has the white on the neck, cap that goes down over the eyes and the partial collar.  

[Bopbop]

Correct thank you.

another case of I went by it 6 times and did not recognize it. There was something that I must have seen in eBird that guided me away. I have got to improve that.

It is in my field guide to birds of Patagonia and the S Atlantic and I went right by it also. By the way I’ve been to Patagonia but do not own any of their clothing:-)