190 



THE GULLS 



positions on the cliff. This is the case at the Bass Rock, but at the 

 Flamborough cliffs (Bempton) in Yorkshire, where I paid particular 

 attention to the point, I did not find it so. The relative position of 

 kittiwakes and guillemots on two of these cliff faces is shown by the 

 following diagrams. 



CLIFF A 



Guillemots (few scattered pairs) 



Kittiwakes 

 Kittiwakes 



Kittiwakes 



Kittiwakes 

 Guillemots on ledge 



% Kittiwafccs 



Kittiwakes 

 Kittiwakes 



Guillemots (forty on a ledge) 



Guillemots (six on a ledge) 



Guillemots (sixteen on a ledge) 



CLIFF B 



Guillemots 



Guillemots (scattered) 

 Kittiwakes 



Kittiwakes 

 Kittiwakes 



KittiwaUcs 



Guillemots 

 Guillemots 



Guillemots 



Kiltiwakes 



Guillemots 

 Guillemots 



DIAGRAMS TO SHOW BELATIVE POSITIONS OF KITTIWAKES AND 

 GUILLEMOTS ON TWO CLIFF FACES AT BEMPTON, YOEKS. 



