BIRDS OF ONTARIO. 11 



GENUS LARUS. 



(42) Glaucous Gull. 



(Larus glaucus.) 

 A regular, but not common, visitor to the great lakes. 



(43) Iceland Gull. 



(Larus leucopterus.) 



Mr. Kay reports having taken one at Port Sydney, Muskoka, April 

 6th, 1898, and Mr. J. H. Ames has one taken at Toronto. 



(47) Great Black-backed Gull. 



(Larus marinus.) 



A regular, but not abundant, winter visitor to the great lakes, more 

 frequently observed than either of the preceding species, perhaps because 

 it is more readily distinguishable when flying. 



(51) American Herring Gull. 



(Larus argentatus.) 



A very common resident, frequenting the great lakes at all seasons, 

 but most abundant in winter. It breeds regularly on many of the lakes 

 and marshes of the interior. It formerly bred on the islands and in the 

 marshes of Lake Ontario and some may yet do so, in secluded places. 



(54) Ring-billed Gull. 



(Larus delawarensis.) 



A very common resident; like the last, most abundant in winter. 

 Breeds in the lakes and marshes of the interior. 



() (58) Laughing Gull. 



(Larus atricilla.) 

 An accidental visitor in summer 



(59) Franklifl's Gull. 



(Larus franklinii;) 



A rare summer visitor, occasionally straggling here from the prairie 

 sloughs where they are abundant. Breeds in nearly all .the large marshes 

 of Manitoba. 



(60) Bonaparte's Gull. 



(Larus Philadelphia.) 



A common spring and autumn visitor to the great lakes, arriving in 

 April and departing at the end of November. It is possible that some 

 breed in the northern part of the Province, but its principal breeding 

 grounds are north and west of Ontario. 



