sentences:  They have a dark black-brown colouration, similar to that of the black-footed albatross, with a black bill and pale grey to buff feathers at the base of the bill and throat.The wings are long and enable a buoyant style of flight.Grey-faced petrels are easily confused with Great-winged petrel ("Pterodroma macroptera") where their ranges overlap in the Tasman Sea, as these species are morphologically very similar.