Grek Ak EIS i 
ORDER I. PYGOPODES. 
COLYMBIDAE (Grebes). 
The Grebes are not numerous enough in this state to have any 
great economic importance. They feed upon a varied diet, consist- 
ing of small fish, tadpoles, small crustaceans, aquatic and land in- 
sects. They also eat a great deal of vegetable matter (grasses and 
water plant). They are considered harmless and their glossy feath- 
ers are valued for millinery purposes. 
REFERENCES : 
1. Forbush: “Game Birds and Shore Birds.” Massachusetts 
Board of Agriculture, 1912, pp. 45 and 48. 
2. U.S. Biological Survey Bulletin No. 17, p. 79. 
U. S. Biological Survey Bulletin No. 38, p. 14. 
1. Aechmophorus occidentalis: Western Grebe. 
Apparently quite rare in this state. Since the publication 
of Knight’s book it has been reported but once. This rec- 
ord is by Blackwelder, in the Tetons. 
2. Colymbus holboelli: Holboell’s Grebe. 
“Migratory; rare. Dr. Jesurun of Douglas has one speci- 
men taken October 18, 1893, and Mr. Bond has mounted one 
for the Cheyenne High School collection. Mr. Bond has 
seen several on the lakes at Cheyenne.” (Knight.) 
4. Colymbus nigricollis californicus: Eared Grebe. 
The most common Grebe of the state, found in almost all 
suitable localities up to 8,000 feet. Reported by almost every 
observer. 
6. Podilymbus podiceps: Pied-billed Grebe. 
“Migratory; very rare. The only records are those of 
Bond of Cheyenne and Dr. Jesurun of Douglas. Dr. Jesu- 
run took one specimen at Douglas, May 5, 1891.” (Knight.) 
