4<d The Ottawa Naturalist. |May 



rather thoroughly explored ornithologically, at least as far as large 

 masses ot birds are concerned. Nor are these the only unknown 

 things in migration.' 



So we see that in spite cf the large mass of data and statistics 

 at hand, and the multitude of workers and observers, there is stil' 

 much to be learned and better understood in that fascinating 

 natural phenomenon : the migration of birds. 



Bibliography. 



Wells W. Cooke. Some new facts about the Migration of Birds. Washington, 



1903. 

 ,, Distribution and Migration of North American Warblers. 



Washington, 1904. 

 Chas. C. Adams. The Migration Route of Kirtland's Warblers. Ann Arbor, 



Mich., 1904. 

 The " Auk ' : ; my own notes. 



BIRD NOTES. 



Prairie Horned Larks. We first saw the Prairie Horned 

 larks this year on March 4th, and as the season advanced they 

 appeared to become more numerous. On April 1st, while walk- 

 ing across the country on Isle Jesus, we were surprised by seeing 

 a lark flying about our heads. As the open country was practic- 

 ally bare of snow, we thought it not unlikely that the bird had a 

 nest nearby. About 50 or 60 feet away we found the nest, which 

 was snugly placed near a stone. The nest contained no eggs. 

 On the same day we located another nest of this species on a hill- 

 side nearby, which was also empty. 



On April 8th we visited these nests again, and they both con- 

 tained full sets four eggs in each. Later in the day we were 

 successful in finding three other nests, two of which contained 

 four eggs each and the other was just about ready for eggs. 



All of these nests were placed in " bald-headed" fields, i.e., in 



pastures where the dead grass was only about an inch high and 



was entirely free of weeds, etc. In the majority of cases the birds 



could not be seen when the nests were found. The young birds 



had begun to form in the eggs of two of the sets. 



W. J. Brown. 

 Westmount, Que., April 9, 1906. 



