P. DeBenedictis 1967 Feb. 13 Punta Suarez, Espanola (Hood) Island, Galapagos. wing up glide + sail described above (One other bird in the group also did so). At fi 2nd minutes of this, it returned to the cliff and after spending a minute making 2 or 3 rather half hearted passes of the cliff flew far out To sea to the SW. My impression of the braking movement was an attempt to land foiled by the heavy wind along the cliff, but the repeated & persistent passes are those that of a White thr Swift at a nesting colony and may be of some deeper significance than just attempts landing. Never saw a bird land but pretty sure I saw a couple just after they left the cliff. The Blue footed Boobies have a greater size range of young than I thought, gowing down to 1/3 grown young. Saw a 5/8 to 3/4 grown young in the same nest. The adults have two eye sizes, one having a wide iris and small pupil ( whistles) - ○ - the other having a wide pupil and small iris ( guantes ) - ○ : A slight difference in size, the guantes being a little larger, especially in the bill, than the whistles. Presume this is a sexual difference. Must check a little more on this and on the leg color of pairs noted by Bob Ryle (says one of a pair has darker legs). Carputer says the Iguanas are highly territorial now and territories well established. The local pair of Ocyptecathes were quite vocal as late as 8:30. Didn't hear as much noise of gulls this night as last. Heard goats a couple of times during the day, but