314 BIRDS OF THE ROCKIES 



Arizona ; sometimes wanders into Colorado ; Aiken found 

 it breeding at San Luis Lakes. 



188. Wood ibis. Tantalus loculator. Rare sum- 

 mer visitor; southern range. 



190. American bittern. Botauuus lentiginosus. Com- 

 mon summer resident ; breeds throughout the State, from 

 plains to about 7,000 feet. 



191. Least bittern. Ardetta exilis. Rare summer 

 visitor ; a few records east of mountains ; one specimen 

 seen M-est of the divide. 



194. Great blue heron. Ardea herodias. Summer 

 resident ; common in migration ; seldom goes far up 

 in the mountains, though Mr. Aiken found one at an 

 altitude of 9,000 feet. 



196. American egret. Ardea egretta. Rare or ac- 

 cidental ; one seen ; general range, the whole of the 

 United States ; in winter south to Chili and Patagonia. 



197. Sncwy heron. Ardea candidissima. Summer 

 visitor ; not known to breed ; the highest altitude is the 

 one taken near Leadville, 10,000 feet. 



198. Reddish egret. Ardea rufescens. Rare or 

 accidental ; only two specimens secured ; southern 

 range. 



202. Black-crowned night heron. Nycticorax nvcti- 

 coRAx NiEvius. Summer resident ; not common ; local ; 

 more plentiful in migration. 



203. Yellow-cro-wned night heron. Nycticora.x vio- 

 LACEUs. Rare summer visitor ; southern species ; not known 

 to breed in State. 



204. Whooping crane. Grus Americana. Rare mi- 

 grant ; more common east of Coloi'ado. 



