THE BIRDS OF WISCONSIN. 
9 
FAHILY LARID^E: GULLS AND TERNS. 
Lams glaueus Briinn. GLAUCOUS GULL. 
Rare winter visitant on Lake Michigan. Dr. Hoy obtained 
three specimens at Racine (1) and saw others during severe 
winters. In the Milwaukee Public Museum are three speci- 
mens procured at Milwaukee, January 8. 12 and 14, 1895. We 
are positive of having seen this species on several occasions 
during winter while engaged in Fish Commission work on 
Lake Michigan. One large specimen was caught on a herring- 
baited hook, but was washed overboard and lost. There is 
difficulty in discriminating between this species and the next, 
so it is impossible to say which occurs most frequently, but we 
are inclined to think that leucopterus is much more often seen. 
Larus leucopterus Falter. ICELAND GULL. 
A regular winter visitant on Lake Michigan, but by no 
means common, although occuring more frequently than 
glaucus. We know of no record for the interior. 
Larus mariuus LPiin. GREAT BLACK-BACKED GULL. 
We have seen this well-marked species on Lake Michigan, 
at the Milwaukee light house, mid-winter 1880-1, and on at 
least two occasions out on the lake. It is, however, rare. 
According to Nelson, not an uncommon winter resident upon 
Lake Michigan. Also recorded in Ridgway's List of Birds of 
Illinois (1874), on the authority of Dr. Velie, of Chicago. 
Given as common at Racine by Rev. A. Constantine Barry (2), 
but Dr. Hoy's list of 1852 does not include it, although his 
observations were made at about the same time and at the 
same place. Dr. Hoy admitted the species, however, at a later 
date. A specimen mounted for the Oshkosh Normal School 
was labeled "Lake Michigan." 
Larus argentatus Briinn. HERRING GULL. 
Very common on Lake Michigan at almost all seasons, and 
a common migrant on all suitable waters of the state. Nests 
commonly on different islands of Green Bay, and on the north 
shore of Lake Michigan. Immature birds, not breeding, may 
be found on any of the larger inland lakes during the summer. 
Remains throughout the winter wherever there is open water, 
and is especially frequent at this season about the larger 
harbors. Not nearly as numerous as formerly. 
1. Nelson. Birds N. E. Til. 
2. Ornithological Fauna of Wis., Proc. Boston Soc. Nat. His. Jan. 1854. 
