163 THE CONDOR VoL. X 



Accipiter cooperi. Cooper Hawk. Abundance doubtful. My only record of 

 this bird is of one seen March 20, 1902, three miles south of Collbran, but judging 

 from notes from adjoining sections I am inclined to think it is not of uncommon 

 occurrence. I have frequently seen a hawk at a distance which I took to be this 

 species, but the above is the only definite record. 



[Accipiter atricapillus. American Goshawk. (Tenerally distrilnited thrnont the State 

 (hiring winter ami not uncommon in the moimtains (hiring the summer. Prohably occurs in the 

 County at all times of the year but never commonl}'.] 



Buteo borealis calurus. Western Red-tail. Summer resident, common; winter 

 resident, not common. By far the most abundant big hawk in the summer, arriving 

 late in March and breeding early in May. Breeds commonly from 6,000 to 9,000 

 feet and in the Buzzard Creek country (8,000 to 9,000) builds in scrub oaks from 

 8 to 15 feet above the ground, and also in the sandstone ledges. In the valleys it 

 nests commonly along the creeks, selecting tall cottonwoods or spruces and building 

 at from 30 to 60 feet above ground. Incubated eggs have been taken as early as 

 May 7th at 8,000 feet. I have included it as a winter resident upon the strength 

 of having seen it February 8 and March 12, 1902, sometime before the bird move- 

 ment starts. Mr. Sullivan has seen it only as a migrant at Grand Junction. 



Buteo swainsoni. Swaitison Hawk. Summer resident, common. With the 

 exception of the Western Red-tail this is the commonest big hawk found in the 

 County. It arrives with the Red-tail and breeds early in May. Probably a very 

 few remain thruout the winter in the lower parts of the Cotmty. Mr. Sullivan 

 states that this is probabh^ the commonest of the larger hawks and buzzards around 

 Grand Junction and they probably breed, but he has never seen them during De- 

 cember and Jantiary. 



[Archibuteo ferrugineus. Ferruginous Rough-leg. Probably a rather common resident, 

 omitted from the list thru being confused with the other large hawks in the absence of speci- 

 mens in the hand.] 



Aquila chrysaetos. Golden Eagle. Resident, common. The rocky portion 

 of the County furnishes ideal homes for this great bird and they occur in all suit- 

 able localities. They are much more in evidence during the winter than in stim- 

 mer, owing to the fact that they nest very early (March and April) and then 

 wander up to high altitudes for the summer, returning to the valleys when the food 

 supply on the Mesa is cut off by snow. During the winter they live largely on 

 carrion, btit so far as my observations go are not depredatory. I have not found them 

 nesting but have seen the birds almost every day during March and April. Mr. 

 Stillivan reports two pairs nesting near Grand Junction in 1903 and 1904, one 

 pair on the cliffs of the Grand Mesa and one on the cliffs of Pinon Mesa about 10 

 miles south of the cit}^ 



Haliaaeetus leucocephalus. Bald Eagle. Mr. Sullivan considers the Bald 

 Eagle more or less common on the Grand River. He says: "in the summer of 

 1904, I saw more Bald Eagles than Golden. On July 11, 1904, I cotmted 9 soar- 

 ing abotit 300 to 500 feet up, just east of the city. Returning home from the east 

 during February, 1904, I counted 7 Bald Eagles along the Grand River either in 

 the cottonwoods or flying along about 75 feet up, below DeBeque. It was not at 

 all uncommon for us to see two or three of these birds going northward almost 

 daily between March and August, 1904. I cannot say that they breed in the cir- 

 citmscribed area to which my observations were mostly confined, but at any rate I 

 never saw so many eagles in the locality (both kinds) as I saw dtiring the summer 

 of 1904, and reports from the higher elevations should show that both kinds breed." 

 Mr. Floyd Smalley reports two birds of this species from the head of Plateau Val- 

 ley at about 6,500 feet. One was a summer record and the other a fall record. 



