Boob. 284. 19. Sula sula Linnaeus - The Red-footed Booby Note.- On islands probably com- pletely wooded this would be the only booby, since it is the only tree-nesting species in that part of the world. The adult red-footed booby is usually entirely white except for the wings from wrist to tip. It exists, however, in many phases, some of which have grayish brown bodies and white tails, others white bodies with dark tails, and still others all gray. A few specimens known to be adult might help settle the taxonomic problems.