ADELIE PENGUINS 



" Hooligan " cocks. 

 Getting lost. 

 Death of parents. 



Adults. 



Sea-leopards. 



Landslides. 



Snow-drifts. 



In the above lists I have made no mention of 

 the wanton depredations committed — owing to the 

 licence given to ignorant seamen — by expeditions 

 which visit the Antarctic from time to time, but as 

 these visits are made at rare intervals, they cannot 

 greatly affect the population. 



Some of the items in my list require explanation. 

 The screes at the foot of the cliff at Cape Adare 

 are perhaps the most thickly populated part of 

 the rookery. As the thaw proceeds, boulders of 

 different sizes are continually falling down the 

 cliff, some of them for many hundreds of feet 

 before they finally plunge in among the nests on 

 the screes, doing terrible damage, and often rolling 

 some distance out into the rookery. At other 

 times, owing to the bursting out of thaw water 

 which has been dammed up at the top of the cliff, 

 102 



