24 WyoMING Birps. 
GAVIIDAE (Loons). 
The Loons are not abundant enough in Wyoming to be of any 
considerable economic importance. ‘They feed very largely upon 
fish. 
REFERENCES : 
1. “Game Birds and Shore Birds,’ Forbush. Massachusetts 
Board of Agriculture, 1912, p. 55. 
?, Yearbook of the Department of Agriculture, 1900, p. 433. 
7. Gavia immer: Loon. 
Fairly common migrant and possibly some are summer res- 
idents. 
ALCIDAE (Auks, Murres, and Puffins). 
34. Alle alle: Dovekie. 
Accidental visitant. Reported by Lockwood. Specimen 
taken near [,aramie, 1904. 
ORDER II. LONGIPENNES. 
LARIDAE (Gulls and Terns). 
The only Gull which occurs in sufficient numbers with us to be 
of economic value is the Ring-billed. While this group of birds 
feeds largely upon materials picked up from the surface of the water 
(dead or dying fish, garbage, etc.), the inland forms eat large num- 
bers of grasshoppers and crickets. The larger species also feed upon 
mice and other small rodents. They have been known to rid a large 
territory of a pest of crickets. (See page 11, this Bulletin.) The 
Terns also feed upon grasshoppers and other insects. 
REFERENCES : 
1. Year Book, Department of Agriculture, 1908, p. 194. 
2. Chapman’s Hand Book of Birds, 1912, p. 152. 
3. Bulletin No. 20, Connecticut Geological and Natural History r 
Survey, 1913, pp. 264-265. 
4. Bancroft’s “History of Utah,’ p. 280. 
“Sea Gull Monument,” pp. 267-274; “Young Woman's Jour- 
nal,” Salt Lake City, November, 1913. 
ot 
