Blaefaced Booby 
May 22, I 923 
May 22, 1923 
June 16 , 1963 
June 
'Sula dactylatra) 
Notes " Birds - Gardner Pinnacles 
(Ball) - nesting abundantly 
(Wetmore) - This booby was the most prominent of the larger 
birds. About ^00 pairs nested on the island. Nesting varied 
from birds that had just selected nesting sites to others 
that had young on the ¥ing. Perhaps half had well grown young. 
For nest sites the birds congregated on the upper third of 
the islands where they were so numerous that their excrement 
formed whitish or yellowish coatings over the black volcanic 
rock that as we came in the first evening appeared light as 
snow. Progress up the slopes was along the ledges appropriated 
by the birds .When the birds had well grown young they 
often attacked us waddling up to deliver a severe bite and at 
all times were fearless. On many ledges where passage was 
narrow it was necessary to clear the birds away to avoid 
possible attack that might lead to a fall. 
(in Journal) - most of Blue-faced Boobies with well grown young. 
(Sibley)(notes) nesting mainly toward the summit of main peak. 
^7 nestlings banded, 6 young too small to band, 2 nests with 
2 eggs, 1 nest with 1 egg (total 56 ^ 112 breeding birds) 
3^ adults and I 6 immatures banded. [Allowing for immatures 
breeding population as indicated by the month of June wasl^4 
birds - considerably less than Wetmore^s estimate- RBC] 
Only the larger of the two peaks had nesting Blue-faced Boobies. 
(Sibley-Amerson-report) from report it may be deduced that 
there were I 70 adults on the island, 45 chicks, and 20 immatures 
which indicates that breeding population was about 150 birds.) 
(Marshall) - seen f rom offshore 
