February 12-16, 1965 —HacknEn^ suomarj": estimated 85,000 plus in 
5 colonies all uith freshly Iratched chicks and e-gs. 2 collected. 4351 banded, 
10 returns. 
February 12, I 965 - Hactcmn, species accovnt: 50 blood samples froinni<„ a simU. 
colony on the south end. of the island. This colony, about 1,000 birds, had 
young just emerging grom eggs late in the afternoon. Birds were captured with 
nets from the fringe of the colony. Hermit crabs were observed attacking several 
chicks before therr had conipletel, emerged from their eggs. 
Feb. 12-16: Total population 85,000 plus in 5 distinct colonies: e on south end 
of island, 3 along west shore on north end 01 island. 4 groups with eggs and 
freshly hatched ciiicks, 1 group mth 4-3/4 grotai nestlings. 4351 banded, 10 
returns. Almost all adults banoed. r^ere captured vrith hand nets. After the initial 
time the colonies were not entered because of an extremely high mortality rate 
t 
amrng freshly hatched chicks due to large numbers of hermit crabs 
Feb. 12 - sampled alOO birds for 50 samples - south end of island. 
HO 
Feb. 13 ” At 5 PM we picked up some geai and headed tovai-d the Sootv Tern colonies 
on the north end of the island. By using nets we were able to band 6 OO 
adul^ 
U ^ 
before dark. After dark v/e tried picking bi.-ds up off of their nests but 
the moon vras far too bright so we returned to our nets and did an acditional 
300 birds. It vrasn't long before we realized th3,t onl 3 r one small part of the 
colony near the guano yeap was actually on eggs. Most of the birds were on 
freshly hatched chicks, shich rapidly rell prey to the very abundant Hermit 
Grabs. Once this was discovered 'we quickly finished up the loose bands and 
moved out of tne colony completely. 
May 30-«Jiine 1 ^ I 965 
sn^riinary: jiistim ted 40^000 only a few on the ground 
900 banded with 19 retuins, 40 blood sauries^ 6 collected 
jMay 31^ - Sibley- species accoimtp 0 e large group (5_ 
on ground ^ Several 
