-12- Blue-faced Booby (Sula dactylatra) All sightings north of the equator are probably from Revilla- Gigedo nesting stations. One bird in the Southern Hemisphere represents the only booby observed in that area. An excellent example of the highly developed behavior pattern which is so typical of the family Sulida was observed and is here recorded. While cruising along at our normal 10 knots a magnificent adult Blue-faced Booby happened to spot the David Starr Jordan. To satisfy its curiosity the beast changed course and flew over our ship to investigate this strange object which had entered its watery domain. In no time at all the bird realized that it could travel along motionless, utilizing the up-draft produced by the ship's bow. Everything was going fine until our great booby spotted a morsal of food, wheeled and dove. The bird returned to the surface with the fish in its bill just in time to see the David Starr Jordan run him over. Red-footed Booby (Sula sula) All Red-feet observed were light phase, and therefore can be attributed to the Revilla-Gigedos Islands, Tres Maria's, and Clipperton Islands. The adults of this race have dark tails making them difficult to distinguish from Blue-faced Boobies at a distance. Red-feets were the most abundant booby at sea, being replaced by Brown Boobies when close to shore. Brown Booby (Sula leucogaster brewsteri) Brown Boobies are the most abundant booby along the coast, and only rarely wander out to sea. This sub-species is identified by the white headed males. Magnificent Frigatebird (Fregata magnificens) The scarcity of frigatebird sightings is due to this species preferring coastal waters, and the probability of this being their nesting season. There is no indication of Fregata minor being present, although it is known to occur in the area. Red Phalarope (Phalaropus fulicarus) This species was recorded in every section and on almost every day of the cruise. The largest concentrations were found along the coast in area "C". Almost every natural slick contained Phalaropes and Storm Petrels as the two plankton feeding birds prefer to feed in calm waters. Phalaropes appeared regularly on nocturnal stations, and could be identified by their call.