I could not get close enough to get a proper identification, but they were gathered in the pilings by the ferry dock.
Red Footed Booby gathering nesting material.
Red footed booby ocean birds diego garcia british indian ocean terriority
The Order Suliformes (dubbed "Phalacrocoraciformes" by Christidis & Boles 2008) is a proposed order by the International Ornithologist's Union. In regards to the recent evidence that the traditional Pelecaniformes is paraphyletic, it has been suggested that the group be split up to reflect the true evolutionary relationships.