Hi VonMaunder.
I don't see how this species links to the storm-petrel - see rule #5 in the first post.
JH
That works. I missed that.We have previously gone from Blue-fronted Lancebill to White-headed Pigeon on the basis that they are both colours so certainly European Storm-petrel to Californian Condor is no weaker on the basis that they are both geographical designations.
All the best
Pauk