BIRDS OF COLORADO. 
49 
THE BIRDS OF COLORADO. 
1. /Echmophorus occidentalis. Western Grebe. 
Migratory ; rare. A western species that finds its eastern 
limit at the western edge of the plains. The only certain 
record for the State is that of H. G. Smith (Nidologist, 
III. 1896, 48) who saw the skins of one that had been shot 
near Denver about October 25, 1888, and of two others taken in 
the vicinity a few days earlier. It may eventually be found to 
breed, in Colorado, since it is an abundant summer resident in 
Utah. 
2. Colymbus holboellii. Holbcell’s Grebe. 
Migratory ; rare ; a northern species coming south in the 
winter. It is a widely distributed species, liable to be found 
anywhere but so far has been noted in Colorado only in the 
southwestern corner in La Plata County, where F. M. Drew 
noted it in the autumn at 10,000 feet (Auk, II. 1885, it ) 
and C. F. Morrison notes it as “rare” in the same locality 
(O. & O. XIII. 1888, 70). It breeds far north, 
3. Coiymbus auritus. Horned Grebe. 
Migratory; rare. Inhabits the whole of North America, 
but its only Colorado record is that of Capt. P. M. Thorne who 
writes, “I find in my journal under date of October 8, 1887, the 
following. ‘Killed a C. auritus. Was alone. Not seen here 
before.’ I do not think a mistake as to identification possible. 
I am familiar with C. n. californicus and P. podiceps.''^ This 
was at Ft. Lyon on the Arkansas River. The Horned Grebe 
breeds from the northern United States northward and comes 
south in the winter. 
4. Colymbus nigricollis californicus. American Eared 
Grebe. 
Summer resident; rare in eastern, not uncommon in 
western Colorado; breeds in suitable localities throughout its 
range from the plains to 8,000 feet, especially on the alkali 
lakes. Mr. Henshaw found it nesting abundantly in the San 
Luis Valley, most of the eggs being fresh June 23. He also 
found the birds quite numerous in migration at Denver as late 
