
Number of albatrosses in study plots 
1000 
900 
Total both species 
800 
700 ; 
- ene — 
ai - 
600 / o-™~c 
alae 
“a 
PO a <I 
uum 
/ Black-footed albatross 
Total of 5 ground plots 
500 \ / 
\Z7 
4.00 
i 
, ae 
/ f 
/ 
‘N of TT -—~ 
‘A Paves Sie ene st ue 
Laysan albatross 
Total of 6 ground plots 
200 Page 
7 am. 9 a.m ll a.m. 1 p.m 3 poem. 5 pome 
Time of day 
Figure 8, Ground counts of albatrosses by species. - (Hourly | 
population changes in nesting plots, November 23, 1956.) 
16 
