478 Colorado College Publication 



27 to June 10, and autumn dates from September 18 to 

 October 13. A flock of 18 came to Prospect Lake, May 22, 

 1898, and 9 were killed. A large flock was reported to Aiken 

 on the Johnson Reservoir, southeast of Colorado Springs, in 

 first week in June, 1907, which remained there several days. 



Mergus americanus. American JVlerganser. Sheldrake. 



A not uncommon migrant ; most of Aiken's records are 

 in the autumn, one as late as November 27, 1905. 



Lophodytes cucullatus. Hooded Merganser. 



An immature bird of this species was brought to Aiken 

 several years ago, which had been killed near Colorado 

 Springs. This is the only record we have of its occurrence in 

 the County, but it occurs occasionally over the eastern part 

 of the State. 



Anas platyrhynchos. Mallard. 



A common migrant, occasionally winters where there 

 is open water. Seven were seen on a pond in Monument Vallev 

 Park April 9, 1913. 



In February, 1895, Aiken visited Clear Lake, near Deserct, 

 Utah, before the marshes had thawed. Towards evening 

 ducks flying high and coming from different directions at in- 

 tervals were observed to drop down to a certain part of a 

 frozen marshy meadow. He approached cautiously to in- 

 vestigate when twenty Mallard drakes suddenly raised theii- 

 heads from above the grass and leaped into the air. They 

 had apparently come to this spot to sleep and were huddled 

 as closely together as possible. 



Chaulelasmus streperus. Gadwall. Gray Duck. 



Migrant, one of the most common ducks in spring and 

 autumn, beginning to fly north the middle or latter part of 

 March, and to come south again in late September. There is 

 one in the Aiken Collection, taken near Falcon, May 3, 1907, 



