498 Colorado College PuBucAtioM 



ber 28, 1913. Forty years ago birds in the mature blue plumage 

 were frequently noted, now they are rarely seen. 



Accipiter velox. Sharp-shinned Hawk. 



Summer resident ; not common. Arrives the first week in 

 March, leaves some time in October. One was brought to 

 Aijcen December 21, 1913. This destructive little hawk is 

 found about the trees and thickets along the streams, in the 

 foothills, and the more open woods in the mountains up to 

 abpve 8,000 feet. 



A nest observed by Lloyd Shaw in Crystal Park con- 

 tained, July 10, 1912, 3 young and one unhatched egg, the 

 young having been hatched a few days previously. The nest 

 was in a Douglass's fir tree about ten feet above the ground, 

 and was an old magpie's nest the roof of which had been torn 

 off, and the cup built up with small sticks until it was very 

 shallow, not much more than a platform. The fourth egg, 

 mentioned above, hatched after July 10, the young bird lived 

 two days, and then disappeared. August first the three sur- 

 viving young were of as many different sizes ; they were still 

 largely in the down, but the quills and retrices were about 

 half out of their sheaths, and the breast markings showed quite 

 distinctly on the largest bird. When disturbed at the nest 

 they fluttered down toward the ground, but had no control 

 over their flight, nor could they perch unaided, though they 

 could sit upright on a perch when placed thereon. 



The well-picked leg of an Audubon's Hermit Thrush was 

 found in the nest on that date, and Shaw had previously found 

 the feathers of a flicker below the nest. The disapperance of 

 a young Three-toed Woodpecker from its nest not far away 

 was also charged against the hawks. 



August 25 and September 1, 1912, a male Sharp-shinned 

 Hawk was seen in the Monument Valley Park. On the first 

 date it was seen chasing a Brewer's Blackbird. On the latter 

 date it was being mobbed by various small birds. Two Flick- 



