BLIXE-FACEb BOOBY 
Annotated List 
' BECKER 
June 17-20, 1923 Population estimate-about 500 pairs here 
(Wetmore, 1923) 
Species account : Common over the higher slopes of the island 
•where they have young from half to nearly grown. Wneh undisturbed the females and 
young frequently utt&e their loud quacking calls in a contented tone. 
June 29 : A big female seen anxiously guarding a runt egg the si^e of a Bulwer f s Petrel.. 
July 26, 1964- Blue-faced Boobies were perch4d on the upright stones on the 
(Kridler, 1964) top of the hill.. Several Blue-faced Booby nests were found, 
containing two eggs ... I estimated ...about 20 immature Blue¬ 
faced Boobies and another 30 immatures [4* adults ?][Bear Bow 
Hill] 
---- 
Sept. 25/ 1964 Actual counts Adults-58 
(Fleet, PQBSP) Immatures-57 
Locals-6 
Total population estimate-190 
(Kridler) ^ estimated population tSf 250 birds. Recorded were 58 adults, 57 immatures, 
and 60 locals not yet capable of flight. 
March 15, 1965 
(Banko , PQBSP) Estimated total island population-230 
(Breeding - 110 nesting adults , 11 wakers, 1 chick) 
(Kridler) Estimated population of 230 birds. Most were found on the summits 
of all the hills. 110 nests were located all of which c ontained eggs, except for 
one in which was found one egg and a very newly hatched chick. One downy young out 
of its nest had the wings and tail partially feathered. Fifty nesting adults %ere, 
banded with band no. 767”00351 through 400. These birds tend to remain at the nests 
when approached and were easier to capture by hand than the other two species. 
Sept.10-11, 1966 
(Kridler) 
There were at least 200 on the island, but no thorough census was 
conducted becasue of the lack of time. All the chicks were almost completely grwon, 
Some, however, were still attendant and being fed by adults. 
March 10, 1967 
(Hackman, PQBSP) (Kept) Population estimate: 200 adults, 1Q3 nests, 3 young .. 
Small naked (newly hatched) chicks were found on Becker Island (3) 
(Botes) Breeding birds were scattered along the ridge in the bare areas. Bests usually 
occurred in little clusters - sometimes 5~6 feet apart. Counted 108 nests: 
43 with 2 eggs (also 2 nests with 2 eggs on Borthwest Cape) 
23 with 1 egg (2 of these pipped) 
1 with 1 egg and 1 naked chick 
2 with small naked chicks 
37 with - unknown contents. 
All birds were reluctant to leave theqr nests, possibly because they are seldom 
disturbed or possibly because amny were on eggs that were about to hatch. Found one 
bird with a light blue egg - about the color of the lines on standard notebook paper. 
