There are currently 59 known species of the Order Suliformes which includes 4 families. I have photographed 7 (11.9%) of these species of birds across all four families shown below with links.
Family: Fregatidae (Frigatebirds – 5 species)
–Magnificent Frigatebird (Fregata magnificens)
Family: Sulidae: (Boobies, Gannets – 10 species)
–Northern Gannet (Morus bassanus)
–Red-footed Booby (Sula sula)
Family: Anhingidae (Anhingas – 4 species)
–Anhinga (Anhinga anhinga)
Family: Phalacrocoracidae (Cormorants, Shags – 40 species)
–Great Cormorant (Phalacrocorax carbo)
–Double-crested Cormorant (Nannopterum auritum)
–Neotropic Cormorant (Nannopterum brasilianum)