Scott on Birds observed at Twin Lakes, Colorado. 95 



of sage-brush bark, very compactly woven, and has no lichens whatever on 

 the outside. Inside it is lined with grass. The eggs have the same general 

 appearance as those of C. virens. 



39. Empidonax obscurus. Wright's Flycatcher. — A single 

 specimen obtained. 



40. Chordiles virginianus var. henryi. Western Nighthawk, 



— Abundant. Breeds. I took an egg July 3, fresh. The ground-color 

 is whitish, thickly sprinkled all over with dark pink. Dimensions, 1.24 



X .86. I took two eggs, July 11, of an entirely diffei'ent color, the 

 ground-color being deep lead, thickly marked with spots of the same color, 

 but much deeper. Dimensions, l.lOx.80, 1.12x.79. The birds fly 

 quite as much in the forenoon as at any time, and it was not unusual to 

 see fifty flying low over the lake at a time. 



41. Selasphorus platycercus. Broad-tailed Humming-Bird. — 

 Common. June 15 I took a male, evidently breeding, that lacked the 

 crimson on the throat. 



42. Ceryle alcyon. Belted Kingfisher. — Met with but once. 



43. Picus pubescens var. gairdneri. Downy Woodpecker. — 

 Not common. One taken June 20. 



44. Picus villosus var. harrisi. Hairy Woodpecker. — Rather 

 common, but shy. July 111 took fully fledged young with red on top of 

 the head. 



45. Picoides americanus var. dorsalis. Banded Woodpecker. 



— Not uncommon in localities. 



46. Sphyrapicus varius var. nuchalis. Nuchal Woodpecker. — 

 Common. Breeds about June 5. Took young fully fledged the 15th of 

 July. The nests are generally low, not more than ten feet from the 

 ground. 



47. Sphyrapicus thyroideus. Brown-headed Woodpecker. — 

 Not rare. Several pairs bred about the Lakes. The 23d of June I found 

 a nest containing four young about two or three days old. The nest was 

 in a " quaking asp," about ten feet from the ground. The entrance to the 

 nest was very small, and the cavity inside not large. July 4, I took three. 

 In nestlings nearly fully fledged the sexual difference was as plainly marked 

 as in the adults. There were two males and two females in this nest. 

 On July 111 found a second nest in a pine-tree about twelve feet from 

 the ground. This contained four young females fully fledged. These 

 birds do not seem shy, but are restless. 



48. Colaptes mexicanus. Eed-shafted Flicker. — Common. 

 Breeds about June 1. Took young fully fledged on July 2 and July 4. 

 Seven in each nest. These nests, like those of most Woodpeckers I found 

 in this region, were not more than ten feet from the ground. The birds 

 are all typical, and show the distinguishing marks of sex in the first 

 plumage. 



49. Bubo virginianus. Great-horned Owl. — Not common. Spe- 

 cimens are much grayer than those taken in the East. 



