Identification
• Long tail
• Short neck
• Red feet
• Black flight feathers
Primaries and, in most populations, outer secondaries
• Bluish bill with pink base
• Bluish skin around the eye
Brown Morph
• Wings darker than head, neck and underside of body
• Pink face
• Bluish bill
• Most have white tip to tail
• Many have dark brown necklace around upper breast
Brown with White tail
Fundamentally similar to the brown phase except that the entire tail, undertail coverts, and uppertail coverts are white.
White Morph
• Entirely white, except for flight feathers
• Distinctive black bar on distal underwing coverts
• Yellow wash on head and neck in some populations
Some Pacific populations have most of the tail black, while in the Caribbean and around Australia, the tail is white.
Juvenile
Birds are similar to the brown color phase, but lack the pink base to the bill. They start out with the bill all gray and feet that are dusky to orange; the bill then turn two-colored with dark tip and lighter inner part that may be fleshy.
The juvenile also have the head and neck lighter than the upperside of the wing, and compared with e.g., juvenile Brown Booby has darker underwing lacking the white areas seen in the latter.
BirdForum Opus contributors. (2021) Red-footed Booby. In: BirdForum, the forum for wild birds and birding. Retrieved 10 January 2021 from https://www.birdforum.net/wiki/Red-footed_Booby