50 BIRDS OF COLORADO. 



as May 15, 1874. Its nest has been taken at Loveland, with 

 fresh eggs June 20, and it is not uncommon on the lakes and 

 reservoirs in the Big Thompson and Cache L,a Poudre Valleys. 

 A few pass across the State and enter Kansas. 



6. Podilymbus podiceps. Pied-billed Grebe. 



Summer resident, rare; in migration, common. The only 

 records of breeding come from the vicinity of Loveland, though 

 it probably will be found breeding over much of the northern 

 third of the State below 7,000 feet. In the southern portion 

 of Colorado it is known only as a migrant, but in open season? 

 a few may remain through the winter. 



7. Urinator imber. Loon. 



Found throughout the State as a migrant and occasionally 

 in winter, but not so common as in most of the country farther 

 east. It has not been known to breed in Colorado, and proba- 

 bly all leave the State for their northern breeding grounds. 



37. Stercorarius parasiticus. Parasitic Jaeger. 



Breeds at the far north and comes south to Colorado as a 

 rare visitant in fall and winter. Three cases have been re- 

 corded. One, in Mrs. Maxwell's collection, was taken at Boul- 

 der in December, some time previous to 1874. A young bird in 

 the dark phase was shot at Sloan's lake near Denver during the 

 fall of 1889. (H. G. Smith, Nidologist, III. 1896, 48.) 



Mr. W. P. Lowe, of Pueblo, writes that one was secured 

 on the Arkansas River a mile below Pueblo in the fall of 1894, 

 and is now in his collection. 



40. Rissa tridactyla. Kittiwake. 



A northern species, rare or accidental in Colorado in the 

 winter. The only known specimen is the one in Mrs. Max- 

 well's collection, which was taken at Boulder in December. 



49. Larus occidentalis. Western Gull. 



A Pacific Coast bird ; accidental in Colorado. The only 

 record for the State is the one Prof Wm. Osburn writes that lie 

 took at Loveland, September 30, 1889. 



51a. Larus argentatus smithsonianus. American Her- 

 ring Gull. 



Inhabits the whole of North America and occurs rarely in 

 Colorado during migration. One was seen for several days by 

 Mr. Breninger, near Fort Collins, and a young bird was shot at 

 Denver, November 17, 1883. (Auk, III. 1886, 384.) 



53. Larus californicus. California Gull. 



A western species that has been found breeding in immense 

 numbers in Utah and has also been once taken in Kansas. It 



