272 THE BIRDS OF IONA AND MULL. 



"a Lewis bird the size of a gull, which flies with great velocity. 

 When it observes the smaller gulls with food in their bills, it imme- 

 diately pursues them so closely as to cause them to drop what they 

 have got, which it easily catches before it reaches the ground." 



The Glaucous Gull. 



C. M'Vean and I watched a gull through a telescope, which we 

 supposed to be a glaucous gull — a large gull, white-tipped wings — 

 feeding on the carcase of a dog or a lamb cast up on the shore. 



!5mH 



