In a recent paper, it was found that the Long-term isolation of the highly mobile Magnificent Frigatebird on the Galapagos Islands has led to genetically different race than that of the Pacific and Caribbean populations.
The article does not say whether they will be considered a separate species of sub-species but it is an interesting read none-the-less. As if ID’ing Frigatebird species wasn’t difficult enough! I still have hundereds of images of Frigatebirds from the Galapagos that are not yet labelled Great or Magnificent. Now they could potentially be Galapagos Magnificent Frigatebirds!