BIRDS OF COLORADO. 59 



172a. Branta canadensis hutchinsii. Hutchins's Goose. 

 Migratory; common. Not quite so common as the Canada 

 Goose and breeding only north of the United States. Passes 

 through in migration spring and fall and a few may winter, 

 since it has been taken as late as December. 



173. Branta bernicla. Brant. 



Migratory ; rare or accidental. An eastern species seldom 

 coming so far west as Colorado. A specimen was shot by Capt. 

 P. M. Thorne at Fort Lyon, April ii, 1883, and though it was 

 not preserved there can scarcely be any doubt of the correctness 

 of the identification. 



180. Oior columbianus. Whistling Swan. 

 Migratory; not common. In former years Swans were 



fairly common over much of western North America, Now 

 they are rare anywhere but are still found in migration in Colo- 

 rado. H. G. Smith mentions four cases of the occurrence of 

 the Whistling Swan at various places in eastern Colorado and 

 says he has heard of others. (Nidologist, III. 1896, 48.) 

 One was shot from a flock of three at Fort Collins, March 16, 

 1895 and preserved by a local taxidermist. 



181. Olor buccinator. Trumpeter Swan. 



Migratory; rare. Apparently not so common as the last 

 species. There was a specimen in the Maxwell collection and 

 H. G. Smith reports two instances that have come to his knowl- 

 edge. It has never been known to breed in Colorado, though 

 breeding but a little farther north in the Mississippi Valley. 

 One was shot during the fall of 1896 near Fort Collins. 



183. Ajaja ajaja. Roseate Spoonbill. 



Accidental visitant; two instances. A southern species 

 not regularly occurring north of tlie Gulf States. In a letter 

 dated June 17, 1888, T. M. Trippe, of Howardsville, Colo., 

 writes to C. F. Morrison, as follows: "A Rosy Spoonbill was 

 captured at Silverton, Colo., the other day. It was caught 

 alive, but died in a day or two. It was a female in fine spring 

 plumage." (O. & O. XIII. 1888, 181.) H. G. Smith notes a 

 specimen in very worn plumage August 8, 1890. Said to have 

 been taken near Pueblo. (Nidologist, III. 1896, 65.) 



184. Guara alba. White Ibis. 



Migratory; rare. A southern species, but once known to 

 have been taken in Colorado, but since it has been taken at 

 Great Salt Lake to the west and up the Mississippi Valley to 

 South Dakota, its occurrence in Colorado may not be acci- 



