192 
BIRDS OF COLORADO. 
Union. In the remainder of these notes the words “Change to’’ 
will be omitted and merely the present name given. 
Seen by Mr. Carter in Middle Park. Mr. L. B. Gilmore re¬ 
ports that one was shot in July, 1897, on Sweetwater Lake, was 
mounted and is now in the possession of Mr. John Boot. This is 
the first summer record for Colorado. 
Page 50. Add. 9. Gavia arctica. Black-throated Loon. 
A northern species occurring as a rare fall and winter 
visitant to Colorado. 
Mr. C. E. Aiken of Colorado Springs, contributes the follow¬ 
ing notes. 
“ Three small Loons were observed on Prospect Lake in the 
suburbs of Colorado Springs, in November, 1898, and all were 
shot by a local gunner. One which I subsequently examined 
proved to be of this species. 
“I also examined in 1883 a specimen killed, I think, the 
previous fall near Colorado Springs. 
“ Colorado is within the probable winter range of the 
species, and it may be a regular visitant.” 
Page 50. Add. [10. Gavia pacifica. PACiric Loon. 
One was shot in November, 1899, near Clayton, New Mexico, just over 
the Colorado line, and was presented by Mr. Jesse Harris to the museum of 
the Agricultural College at Port Collins. 
This is the western form, not before recorded east of the Rocky 
Mountains.] 
Page 50. Add. [11. Gavia lumme. Red-throated Loon. 
The distribution of this species is given in the A. O. U. Check List as 
“Northern part of northern hemisphere, migrating southward in winter nearly 
across the United States.” This would bring Colorado within the limits of 
its distribution, and hence it is one of the species that should be especially 
sought. It has been taken in Nebraska. 
In the following pages about twenty such species are included as show¬ 
ing what will probably be found some day in Colorado, and to direct attention 
to them as species for future investigation.] 
Page 50. 53. Larus californicus. California Gull. 
Mr. Carter’s collection contains two specimens of this Gull; 
one taken April 28, 1884, in Middle Park at 7,000 feet, and the 
other taken at Denver, October 26, 1878. 
Page 51. 54. Larus delawarensis. Bing-billed Gull. 
The present writer found this species breeding quite eom- 
monly June 18, 1898, at the San Luis Lakes at an altitude of 
7,500, being more than a thousand feet above previous breeding 
records. Mr. Carter has never found them breeding nor seen 
them in fall migration, but in spring has seen them in both 
South and Middle Parks. 
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