ENDERBURY ISLAND 
\\\ 
' niLA_E?H- 
gjs* 
If1 
r .-n~ Tv T»rm 
has six more breeding species than Enderbury despite the absence of trees. Two 
procellarids formerly nested on Enderbury and five of the six additional nesting species 
on Phoenix Island are procellarids. Enderbury's present lack of 
procellariids probably resulted from the introduction of cats in the late 1930's. 
Historical data are so scanty, that, for the most part, it is inpossible to 
document changes in the avifauna. Nonetheless the avifauna has probably changed somewhat 
in the last century as a result of human activities and manaalian introductions 
as on Howland Island (Sibley and Clapp in prep.) Polynesian rats have been present 
on Enderbury from the earliest records of human occupancy until the 1940 's when the 
species was exterminated by an introduced population of cats. The cats, in turn, 
were present until _________ when they were exterminated by POBSP personnel in the h&pe 
that jsjDg Enderbury would eventually s upport and avifauna more similar to primeval 
conditions. 
Of the eight common nesting species (Red-tailed Tropicbird, Blue-faced Booby, 
Red-footed Booby, Great Frigatehird, Lesser Frigatebird, and Gray-backed Tern) 
have annual peaks in their xspsx reproductive activities. One (Sooty Tem) apparently 
nests every six months and one (Browb Booby) does not seem to exhibit any particular 
choice of breeding season. All six of the former species have a spring or summer 
nesting peak and the Sooty Tern has peaks in January and June. 
Tiff' r ~ - iiuin ■ Hi 1 * 1 ■ ^ ~ ■ ■ 90m n 
o n t f r. 
/.'S' a. i a *Sfo 
tha/j^ te-^i ftfe - catu ill 
j jk iw g a sit 
V^<#.A\4, lvxfvV4tAM4| 
an Ti r * 'i l "’ 11 ‘T1* 1 " | ■ hi.i^a'^K. • j-' I,-, ryi 1-1 f-' - .. III. 1 1 iff 
t i j ucijm cz v_Lp.ctuiict ®uuil 5: LtSilliffiiJL'i.. 
M-WB, _ JW 9 W 
■ * 1 . a ■ 
■ XX 
w %w:?> - J ipri!^ 
i.M 1 ant-11 
W Js &|R txie Jt 1 
/ 
■%) 
Mujbal Cfflet ,.|0f I it Ammorfr: :s, gL . ^. 
f n&sf-n "W ■ '<|raj|r six’ jiifHtlls an<| *****"& ' 51 
p, csrj 
aaa sia1 
_ ____ Hi ] 
! «/-•»%*» e^<*rfev«.wHi uX <4. : “*. ‘ 
.. _ ! *- ve a Spfeing or Su # nestinft/eak ' ..a t:4 —X ri. A. 
Wr.f.. 
ks in January and June. BasrJ Xe the, .evidence 
i i ® w a-p 
m Vde i 
h 
am ■ W r fe: 
t v' 7 
dP 
On Howland Island the period from July 1963 to February 1964 was unfavorabl 
for ne ,r + 
ting (Sibley 
Clap], 19“ in prep) 
LH( 
s s ting sue cess >/a s 
very loan 4 siinilar situation 4e j'ounc. on Anterbury island during this period 
although it does not 
ar to have been a 
: i o ra 
d *0 k./ j_ aa 
longea* T 
