Note the pointed gular outlined in white and the the extra long wedge-shaped tail. These features help separate this species from the similar Double-crested Cormorant. This individual is molting into breeding plumage evidenced by the white outline to the throat, but has not yet acquired the white head plumes of full breeding plumage. Two subspecies are recognized. This is the smaller, paler "P. b. mexicanus" which breeds from Costa Rica north into the southern United States where it continues to expand its range.