BLUE -FACED BOOST 
Annotated List-WIHOA-p. 2 
March 8-9? L9o7 
f Hackman, POBS?) 
(Kept) Population estimate: 2 adults (Botes) 2 on lock ledge 
halfway to top --south side* Seem to be only two on island 
at present. 
Sept.13 ~l4- ? 1967 
dler) 
fitra 
Were very common. Bo attempt made to estimate numbers. Chicks 
with down were noted on Miller Plat. 
March 7”9?- 1968 
(Clapp) 
Blue-faced Booby 
Estimated diurnal papulation - 
Estimated breec 
lumber of nest 
ng pop 
ulation 
- 
300 
c ount 
ed - - 
mm mm 
1 PP 
eked n 
ests - 
- - 
nest 
sites 
- - 
with 
eggs - 
- - 
7^ 
with 
young- 
- - 
none 
m // of 
nests/ 
eggs 
present on sample count - - - 117 
i-P-e nest counc^ taken on the same day that the Pinch transects 
r ^ n vlarcn S) can oe oroken down int0061 general areas since the'tartlet 
panus «_n one xinch count worked generally non-overlapping areas. Areas 1 
a comprise the upper west portion of the island (area 2 ^referring 
• > 
bpee^xxcaiiy oO tne Miller Plateau area, area 1 being the rest of the upper 
west .portion). Area 3^ is the lower west portion (West and West Palm Valleys 
mtermeaiawe areasj. Area 4- comprises the central upper portion (from 
—*idge caSo 01 Milmer Canyon- across Middle Valley to where the island'- 
begins m ascend rapidly to fanager Peak). Area 5 is the upper east portion 
ycne Tanager Peak area and the upper portions of East and East .Palnf- - 
Aalieys). Area 6 is the lower east portion (Lower 
Valleys). 
.0ns o; 
Eas - 
.st 
Jo | rr 
P 
inese areas were covered by the ..following individuals: Areas 1 and 
: Eosaka; Area 4-: Clapp; Area 5- Sincock; Area 6: Een- 
J 1 *1 . r> 
Kr idler; Ax-ca 0 
v»-mo 
y° r *‘ These areas Vila oe referred *o again under the sanrale counts I'o, 
Brown Boobies. 
xn^ breakdown oy area (See Table 1 below) for the Blue-faced Booby 
nest count seems to indicate a clear preference for areas 2 (Miller Plateau) 
A (prt.merely tne Tanager. Peak area) . My observations within area 4- 
revealed a few nests at the crests of ridges In the interior of the 
island but the large majority of nests were within ten feet of the sheer 
edges of the north cliffs. These data suggest that the Bihoa Blue-faced 
mccsies ciearly prefer to nest on the higher elevations of the island. 
