IOO THE CHICAGO ACADEMY OF SCIENCES. 



Falco (JEsalon) lithofalco var columbarius B. B. & R. Hist. N. Amer. 



B., Ill, 1874, 143, 144. 

 Popular synojiyms : AMERICAN MERLIN. BULLET HAWK. 



This little Hawk is a rare resident but not uncommon during 

 its migrations. Mr. E. W. Nelson records* it as an ''abundant 

 migrant, from March 2Oth to May 1st, and from September I5th 

 to October 5th." He also considered it a rare summer resident. 

 I have found this species very bold and unsuspicious, and have 

 an adult bird in my collection, which I captured at South Chicago, 

 March 18, 1890, while it was attempting to catch an English 

 sparrow among the cars in the freight yard of the Illinois Central 

 Railroad. 



Its range includes the northern portion of South America, 

 the West Indies, and the whole of North America. It breeds 

 chiefly north of the United States. 



Falco sparverius Linnaeus. American Sparrow Hawk. 



Falco sparverius LINNAEUS, S. N., ed. 10, I, 1758, 90. 

 Popular synonyms : AMERICAN KESTRIL. MOUSE HAWK. LITTLE 

 BLUE HAWK. 



A common summer resident in a portion of our area, arriv- 

 ing early in the spring and departing when severely cold weather 

 sets in. Mr. B. T. Gault informs me that the Sparrow Hawks 

 are not common in DuPage County, and that they are not known 

 to breed there. Mr. E. W. Nelson says* that this species is an 

 "abundant migrant and rather common summer resident." 



The range of this species includes North America east of the 

 Rocky Mountains, from the Great Slave Lake south to the north- 

 ern portion of South America. 



Genus PANDION Savigny, 1809. 



Pandion haliaetus carolinensis (Gmelin). American Osprey. 

 Falco carolinensis GMELIN, S. N., I, i, 1788, 263. 

 Pandion carolinensis AUDUBON, B. Amer., 1831, pi. 81. 

 Pandion haliaetus carolinensis RIDGWAY, Proc. Acad. Nat. Sci. Phila- 

 delphia, 1870, 143. 

 Popular synonyms: FISH EAGLE. FISH HAWK. 



A rare migrant, seen principally along the shore of Lake 

 Michigan, or on our larger inland lakes. I have observed them 

 on both Berry and Calumet lakes. An adult specimen now in 

 the collection of The Chicago Academy of Sciences, was taken 

 on the Fox River, near Lake County, Illinois, September 28, 



*Birds of Northeastern Illinois, Bull, of the Essex Institute, Vol. VIII. 1876, 118. 



