52 BIRDS OF COLORADO. 



July 9, 1889, and Mr. Ridgway has identified for H. G. Smith 

 one that was shot near Denver in the spring of 1887. (Nidolo- 

 gist, III. 1896, 48.) 



[74. sterna antillarum. Least Tbrn. 



In the Auk, XI. 1894, 182, the present writer added this to the list of 

 Colorado birds on the strength of a mounted specimen at Colorado Springs that 

 he was told had been taken in that vicinity. Further investigation has con- 

 vinced him that the specimen was secured outside of Colorado. There is now 

 no certain record for this State. It is a southern species that breeds as far north 

 as Kansas, and will undoubtedly some day be obtained in Colorado.] 



'J']. Hydrochelidon nigra surinamensis. Black Tern. 



Summer resident; not uncommon; in a few localities, 

 nests quite abundantly; somewhat more common in migration. 

 It is found on both sides of the range almost anywhere that the 

 natural conditions are suitable. Reaches northern Colorado the 

 middle of May. 



120. Phalacrocorax dilophus. Double-crested Cormo- 

 rant. 



All the records for Colorado come from the eastern foot- 

 hills. There was one in Mrs. Maxwell's collection and H. G. 

 Smith records four instances near Denver ; one about November 

 I, 1885, one about October i, 1891, from a flock of about 30, one 

 in the fall of 1886, and a fourth from Jones' I/ake, near Denver. 

 (Auk, III. 1886, 284, and Nidologist, III. 1896, 48.) Since it 

 has been found breeding abundantly in Utah, it will probably 

 yet be found in the western half of Colorado. 



125. Pelecanus erythrorhynchos. American White Pel- 

 ican. 



Formerly not uncommon in migration and some remained 

 to breed : now rare in migration and no late record of its breed- 

 ing. It is still occasionally noted from both sides of the range. 

 Has been taken in the San Luis valley in October, 1887, at 

 8,000 feet, but usually is found below 5,500 feet. Still breeds 

 in Wyoming and Montana. Passes across Colorado late in April 

 and early in May. 



129. Merganser americanus. American Merganser. 



Resident; winter sojourner not uncommon; rather more 

 common in migration ; breeds along the northern boundary of 

 the United States and northward and a few breed in the mount- 

 ains and mountain parks of the north half of Colorado. It is 

 found in winter wherever there is open water along the South 

 Platte, especially near Fort Morgan, and is likely to be noted on 

 any open water on the plains. It is most common in April, 

 moving northward. It has been reported less commonly from 

 the western half of Colorado, but as it is of general distribution 

 in North America, it probably occurs throughout the State. 



