THE BIRDS OF BOULDER COUNTY 227 



190. Botaurus lentiginosus — American Bittern. 



Summer resident on plains, not common. 

 194. Ardea herodias — Great Blue Heron. 



Common summer resident on the plains and occasionally seen in the foothills. The 

 St. Vrain colony near Hygiene is well known. 

 197. Egretta candidissima — Snowy Heron. 



Rare migrant on plains. One reported by Hersey in 1876. Two collected in spring 

 of 1908, one of which is in University Museum. 

 202. Nycticorax nycticorax naevis — Black-crowned Night Heron. 



Summer resident, not common. Two in University collection. 

 212. Rallus virginianus — Virginia Rail. 



Summer resident on plains, not uncommon. Two specimens in University collection 

 and one nest with n eggs, collected by Bragg northeast of Boulder on June 7, 1904. 

 Rockwell collected a nest and eggs at Budd reservoir, May 28, 1904. 

 214. Porzana Carolina — Sora. 



Summer resident, not uncommon. Felger found one dead on Arapahoe Glacier, 

 altitude about 12,000 feet, in 1904. Gale found a pair at 9,500 feet apparently with nest 

 on June 28, 1889, but did not find nest. Nest collected by him in University collection 

 dated May 25, 1880, but no locality given. One with 14 eggs collected by Bragg northeast 

 of Boulder on June 7, 1904, in University cabinets. 

 221. Fulica americana — American Coot. 



Common summer resident on plains, abundant in migration. 



223. Lobipes lobatus — Northern Phalarope. 

 Occasional on plains in migration. 



224. Steganopus tricolor — Wilson Phalarope. 



Common in migration on plains, less common as a summer resident. Gale found its 

 eggs (from two to four per set) in May and June. 



225. Recurvirostra americana — American Avocet. 



On plains in migration, not common. A pair observed by Rockwell at Twin Lakes, 

 near Niwot, May 20, 1904, which indicates nesting. 

 [226. Himantopus mexicanus — Black-necked Stilt. 



Record too doubtful to be retained.] 

 228. Philohela minor — American Woodcock. 



Rare summer resident on plains. One seen near Boulder in 1887 by Mr. John Bentley 

 (Cooke and H. G. Smith), one seen by the writer one mile east of Boulder in 1905, on 

 May 24 and 30. Reported also by Rowland. 

 230. Gallinago delicata — Wilson Snipe. 



Common on plains in migration, rare winter resident. In February, 1904, the 

 writer noted it frequently on Boulder Creek just outside of the city limits. Gale noted it 

 only as a winter visitor on the plains. Nesting in fair numbers northeast of Boulder for 

 past five years (Dille). 

 [233. Micropalama himantopus — Stilt Sandpiper. 



Record too uncertain to be retained.] 



