72 BIRD BIOGRAPHIES 



longer she swam about, then heading 

 towards the nest, left the water and 

 reached her eggs. I at once began to get 

 living records of her every movement with 

 my bioscope, and when she had been on 

 her eggs for nearly an hour I made a slight 

 noise and she left. By turning my camera 

 round I was able to get some pictures of 

 her swimming on the water, but she soon 

 returned to her eggs, and I secured many 

 more pictures of her with both cameras. 



The Black-throated Diver is a marvel- 

 lous swimmer. What interested me most 

 was the clever way she was able to sub- 

 merge herself. This was quite different 

 to ordinary diving. When the bird dives 

 it puts its head down and the body 

 follows, but I noticed that when it left 

 its nest, it kept very low while travelling 

 along the land, entered the water with 

 as little of its head and body showing as 

 possible, and as soon as it was clear of 

 the land it just floated on the water with 



